what is the scope of the mine threat in ukraine? >> unrecognizable in modern times. >> we watched a young deminer probing for a trip wire that

could detonate a mine nearby. russia has sown ukraine with millions of mines. she threaded the grass, feeling for the slightest resistance. the day before, another deminer had been killed. think of it as kind of a pocket therapist. >> and you'll be able to course with it, just like you would with a human being. >> an app on your phone that using artificial intelligence to manage problems like depression and anxiety. >> there's never been a greater need, and the tools available have never been as sophisticated as they are now. >> really? computer psychiatry? come on. what kind of yankees fan would target yogi berra? the star catcher won a record ten world series rings. yogi wore one and kept the other nine here. that is until a rainy october night in 2014. >> what did you do with the

rings? >> cut them, melted them. >> that's right. this minor league thief melted down priceless world series rings for some cash. i'm lesley stahl. >> i'm bill whitaker. >> i'm anderson cooper. >> i'm sharyn alfonsi. >> i'm jon wertheim. >> i'm cecilia vega. >> i'm scott pelley. those stories and more tonight on "60 minutes."

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in ukraine ends, dr. yuriy kuznetzov will be battling vladimir putin's madness for years. kuznetzov is a ukrainian surgeon and a national hero, who stayed beside his patients, as they were attacked. now heroism is a virtue that must endure. his city was liberated, but dr. kuznetzov sees victims every week or so, civilians who step on one of the millions of russian land mines across about a third of ukraine. there's a massive effort to clear the mines, but that will take a generation or more. until then, there will be dr. kuznetzov with healing hands and eyes that have seen too much. >> half his life he's devoted to central hospital. and here in its basement with putin's bombs overhead, all he'd become in 52 years was lay down

in service to his home. >> translator: we didn't imagine until the end that russia would attack our country. when you're sitting in a basement at night and a plane is flying over you, it was impossible to predict whether you would wake up to see another day. >> in 2022, the basement became dr. kuznetzov's operating room. that's him dressed in white. the wounded were endless. a close friend's wife he could not save, and this man, who was shot and lived. >> did you save more patients than you lost? >> translator: we saved significantly more people, definitely. >> many of your colleagues evacuated, and you did not. i wonder why you stayed. >> translator: when you have

patients and you're the only doctor or the only person who can treat them, i -- i didn't understand how you could leave. >> he could not leave izium. his city of 40,000 was occupied for six months. the russians laid land mines here, as they ran from ukraine's counterattack. putin's unprovoked war on an innocent people destroyed 80% of izium and killed 1,000. leaving apartment buildings cleaved in two and this school, built in 1882, a hollow corpse. the people of izium clothe themselves in liberation, and [ speaking in a global language ] [ sound of artillery ] >> demining teams are still fighting russia here.

izium, 20 miles from the front, is one of the worst areas for mines and unexploded ordnance. throughout ukraine, more than 1,000 civilians had been wounded by mines. lidia borova, a 70-year-old widow, was picking mushrooms in a forest. >> translator: i turned by the tree, and then there was an explosion. i looked down at myself, and i was bleeding. my arm was injured. my leg was injured. i was losing strength. >> her right foot and ankle were ripped away. kuznetzov said, first of all, the most difficult thing is to persuade a patient that their it's very difficult to explain to them that the leg is no good, no good to use. he told us a prosthetic is

ultimately easier to live with. >> translator: dr. kuznetzov saved me, she told us. i didn't realize how much blood i lost. i don't know how i managed to survive. >> ihor bogoraz was with his wife in their garden. they found 12 mines, but there were 13. >> translator: i decided to mow the weeds, he told us. and one mine was under my foot. i stepped on it, and it exploded instantly. and that's it. no leg. >> serhii nikolaiv was recovering grapevines for the spring. if it had been green, he told us, i would have noticed it. but it was brown. i didn't see it. it blended in with the leaves.

i stepped on it, and i knew right away. kuznetzov said, the majority are those who stepped on pedal mines, or anti-personnel mines. the person who invented them was an evil genius because they only weigh two ounces, but what they can do when triggered is terrified. pedal mines, 5 inches long flutter from aircraft by the thousands like flower petals. 11 pounds of pressure will set them off. vasyl solyanik found them on his roof and in his garden. there's 18 here, he told us, but in all, there were over 50. he showed us his video. that's a petal mine right there. they are so common that we were told the story of a 70-year-old

woman who gathered them in a basket and took them to a police station. solyanik told us, there's some left in the bushes over here, so don't walk around there. he dialled 101, and emergency services sent deminers ivan shepelev and ihor ovcharuk. we encounter every type of munition, ovcharuk told us, anti-infantry and anti-tank mines, mortars, artillery shells, rockets. it's all here. at solyanik's home, a sweep revealed an unexploded cluster bomb. those are tricky, so they blew it in place. ivan shepelev told us, as the russians fled, they also left booby traps. we have seen cases,

unfortunately, where explosives were found in civilian homes, ovcharuk said. my team also had to work on removing our dead ukrainian soldiers whose bodies had been mined. in 2022, ihor ovcharuk's kneecap was shattered when a fellow deminer stepped on a mine and lost his foot. shepelev told us, we know every explosive we remove means that someone's life is saved. a few weeks after our visit, a russian missile wrecked the fire station where they're based. some were injured but not shepelev or ovcharuk. >> what is the scope of the mine

threat in ukraine? >> i think the scope is unrecognizable in modern times. >> pete smith heads demining here for the halo trust, a charity founded in 1988 to demine war zones. smith was 33 years in the british army and awarded by queen elizabeth for disarming an ira time bomb in a train station. today, he says, ukraine is the most heavily mined country. >> in some areas, the mine fields are three or four mines deep, in areas, maybe a dozen mines deep. but that's just the first line of defense. then several kilometers behind that, there are other layers of mine fields as well. >> smith took us to a farm sewn with russian anti-tank mines. you have to step carefully. right there in the center is a mine packed with 17 pounds of high explosive.

with three weeks of training behind her, yulia yaroshchuk was probing for any trip wire that would detonate a mine near her. she threaded the grass, feeling for the slightest resistance. only the day before, a halo deminer was killed and two were wounded in another part of ukraine. >> doing this by hand with that wand, it seems to me that you have an awfully big field to cover. she said, well, of course it'll be a very long process. as far as i know, it'll take many, many years. each day of war means years of demining. >> why do you do this work? >> translator: i didn't have to do it.

i wanted to do it. this is my contribution to victory. >> will ukraine ever be without mines? >> i think what i have seen in my time in ukraine is the innovation, the patriotism, and just the sheer will of the people that i'm confident that they'll be able to remove the last mine from ukraine. >> does this war make any sense to you? >> translator: not to a single person here or anywhere, serhii nikolaiv said. what kind of mind -- what kind of moron or idiot do you have to be to even wish something like this on your enemies? you can't. even now someone could drop a fork or a spoon, and it makes a loud noise. and in your soul, you feel pain

and bitterness and fear. it's a real horror. my sister-in-law was ripped apart by a mine in front of her children. in front of their eyes. >> of all of vladimir putin's war crimes in ukraine, one was the bombing of izium's central hospital. kuznetzov told us, after this part of the hospital was damaged, a lot of medical services simply became unavailable. here, we had both intensive care and three operating rooms. when yuriy kuznetzov was 14 yars old, his grandmother died in his arms. he told us that's why he became a doctor.

and we suspect that's why he stayed through the bombardment and occupation and the battle of the mines. >> when a town loses its hospital, it doesn't just lose the medical care, it loses hope. >> translator: the best praise for me was when a woman told me in april 2022 that when we heard the hospital was still open, we realized that our town had hope. it could withstand, survive, and have a future. >> the future of ukraine will demand devotion and heroic patience. on this day, yulia yaroshchuk slowly teased out one russian mine, with millions more receding from its edge.

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now, dr. jon lapook on assignment for "60 minutes." >> artificial intelligence has found its way into nearly every part of your lives, forecasting weather, diagnosing diseases, writing term papers. and now a.i. is probing that most human of places, our psyches, offering mental health support, just you and a chatbot available 24/7 on your smartphone. there's a critical shortage of human therapists, and a growing number of potential patients. a.i.-driven chatbots are designed to help fill that gap by giving therapists a new tool. but as you're about to see, like human therapists, not all chatbots are equal. some can help heal. some can be ineffective, or worse.

one pioneer in the field, who has had notable success joining tech with treatment, is alison darcy. she believes the future of mental health care may be right i our hands. >> we know the majority of people who need care are not getting it. there's never been a greater need, and the tools available have never been as sophisticated as they are now. and it's not about how can we get people in the clinic. it's how can we actually get some of these tools out of the clinic and into the hands of people. >> alison darcy, a research psychologist and entrepreneur, decided to use her background in coding and therapy to build something she believes can help people in need, a mental health chatbot she named woebot. >> like woe is me. >> woe is me. >> woebot is an app on your phone, kind of a pocket therapist that uses the text function to help manage problems like depression, anxiety, addiction, and loneliness, and do it on the run.

>> i think a lot of people out there watching this are going to be thinking, really? computer psychiatry? come on. >> well, i think it's so interesting that our field hasn't, you know, had a great deal of innovation since the basic architecture was relayed in by freud in the 1890s. that's really the idea, two people in a room. but that's not how we live our lives today. we have to modernize psychotherapy. >> woebot is trained on large amounts of specialized data to help it recognize words, phrases, and emojis associated with dysfunctional thoughts and challenge that thinking, in part mimicking a type of talk therapy caled cognitive behavioral therapy, or cbt. >> it's actually hard to find a cbt practitioner. and also, if you're not by the side of your patient when they are struggling to get out of bed in the morning or at 2:00 a.m. when they can't sleep, when

they're feeling panicked, then we're actually leaving clinical value on the table. >> and even for people who want to go to a therapist, there are barriers, right? >> sadly, the biggest barrier we have is stigma. but there's insurance. there's cost. there's wait lists. i mean, this problem has only grown significantly since the pandemic. and it doesn't appear to be going away. >> since woebot went live in 2017, the company reports 1.5 million people have used it, which you can now only do with an employer benefit plan or access from a health professional. at virtua health, a non-profit health care company in new jersey, patients can use it free of charge. >> and you'll be able to converse with it just like you would with a human being. >> we downloaded woebot, entered a unique code that can only be provided by the company, then tried it out. >> we found that for people to connect with their mood, we offer those emojis, which allows

people to connect in a non-verbal way. >> i posed as someone who is depressed. after several prompts, woebot wanted to dig deeper into why i was sad. so i came up with a scenario that i fear the day my child would leave home. >> imagine what your negative emotions would be saying if they had a voice. can you do that? write one of those negative thoughts here. i can't do anything about it now. i guess i'll just jump that bridge when i come to it. >> the normal expression is cross that bridge, and the chatbot detected something might be seriously wrong. >> but let's see. jon, i'm hearing you say, you can't do anything about it. i guess i'll just jump that bridge when i come to it. i think you might need more support than i can offer. a trained listener can help you in ways that i can't. would you like to take a look at specialized help lines. >> it's not our job to say you're in crisis or you're not because a.i. can't really do that in this context very well yet.

but, huh, there is something concerning about the way jon just phrased that. >> saying only "jump that bridge" and not combining it with, i can't do anything about it now, did not suggest human help. luke a human therapist woebot is not foolproof and can't detect whether someone might be suicidal. >> how would it know, jump that bridge -- where is it getting that knowledge? >> it has been trained on a lot of data and a lot of us humans labelling the phrases and things that we see. so, it's picking up on kind of sentiment. >> computer scientist lance eliot, who writes about artificial intelligence and mental health says a.i. has the ability to pick up on nuances of conversation. >> how does it know how to do that? >> the system is able to, in a sense, mathematically and computationally figure out the nature of words and how words associate with each other. so, what it does is it draws

upon a vast array of data, and then it responds to you based on prompts or in some way that you instruct or ask questions of the system. >> to do its job, the system must go somewhere to come up with appropriate responses. systems using what's called rules-based a.i. are usually closed, meaning programmed to respond only with information stored in their own databases. then there's generative a.i., in which the system can generate original responses based on information from the internet. >> if you look at chat gpt, that's a type of generative a.i., it's very conversational, very fluent. but it also means that it tends to make it open ended, that it can say things that you might not necessarily want it to say. it's not as predictable. while a rules-based system is very predictable. woebot is a system based on rules that's been very, kind of, controlled so that that way it doesn't say the wrong things. >> woebot aims to use a.i. to bond with users and keep them

engaged. >> sometimes you can be a little pushy for folks. >> that's absolutely bizarre. so, we have to dig in there to that. >> its team of staff psychologists, medical doctors, and computer scientists construct and refine a database of research from medical literature, user experience, and other sources. >> it would lead to a better conversation. >> then writers build questions and answers -- >> the structure, i think, is pretty locked in. >> -- and revise them in weekly remote video sessions. >> actions, thoughts, and they're all interrelated. >> woebot's programmers engineer those conversations into code. because woebot is rules-based, it's mostly predictable. but chatbots using generative a.i. that is scraping the internet are not. >> sometimes people refer to it as an a.i. hallucination. a.i. can, in a sense, make mistakes or make things up or be

fictitious. >> sharon maxwell discovered that last spring after hearing there might be a problem with advice offered by tessa, a chatbot designed to help prevent eating disorders. which left untreated, can be fatal. maxwell, who had been in treatment for an eating disorder of her own and advocates for others challenged the chatbot. >> so, i asked it, how do you help folks with eating disorders. and it told me that it could give folks coping skills. fantastic. it could give folks resources to find professionals in the eating disorder space. amazing. >> but the more she persisted, the more tessa gave her advice that ran counter to usual guidance for someone with an eating disorder. for example, it suggested, among other things, lowering calorie intake and using tools like a skinfold cal per to his measure

body composition. >> the general public might look at it and think, that's normal tips, like, don't eat as much sugar or eat whole foods. but to someone with an eating disorder, that's a quick spiral into a lot more disordered behaviors and can be really damaging. >> maxwell reported her experience to the national eating disorders association, which had featured tessa on its website at the time. shortly after, it took tessa down. ellen fitzsimmons-craft, a psychologist specializing in eating disorders in st. louis helped lead the team that developed tessa. >> that was never the content that our team wrote or programmed into the bot that we deployed. >> so, initially, there was no possibility of something unexpected happening? >> correct. >> you developed something that was a closed system. you knew for this question, i'm going to get this answer. >> yep. >> the problem began, she told us, after a health care technology company she entertainment partnered with

named d cass took over the programming. she said cass explained the harmful messages appeared when people were pushing tessa's question and answer feature. >> what's your understanding of what went wrong? >> my understanding of what went wrong is that at some point -- and you'd really have to talk to cass about this -- but that there may have been generative a.i. features that were built into their platform. so, my best estimation is that these features were added into this program as well. >> cass did not respond to multiple requests for comment. >> does your negative experience with tessa being used in a way you didn't design, does that sour you towards using a.i. at all to address mental health issues? >> i wouldn't say that it turns me off to the idea completely because the reality is that 80% of people with these concerns never get access to any kind of help. and technology offers a solution, not the only solution, but a solution. >> social worker monika ostroff

who runs a nonprofit eating disorders organization was in the beginning stages of developing her own chatbot when patients told them about problems they had with tessa. she told us it made her question using a.i. for mental health care. >> i want nothing more than to help solve the problem of access because people are dying. this isn't just somebody's sad for a week. this is people are dying. and at the same time, any chatbot could be, in some ways, a ticking time bomb, right, for a smaller percentage of people. >> especially for those patients who are really struggling, ostroff is concerned about losing something fundamental about therapy, being in a room with another person. >> the way people heal is in connection, and they talk about this one moment where you know as a human you've gone through something. and as you're describing that, you're looking at the person sitting across from you. and there's a moment where that

person just gets it. >> a moment of empathy. >> mm-hmm. you just get it. like, you really understand it. i don't think a computer can do that. >> unlike therapists, who are licensed in the state where they practice, most mental health apps are largely unregulated. >> are there lessons to be learned from what happened? >> so many lessons to be learned. chatbots, especially specialty area chatbots, need to have guardrails. it can't be a chatbot that is based in the internet. >> that's tough, right, because the closed systems are kind of constrained and they may be right most of the time. but they're boring eventually, right? people stop using them. >> yeah. they're predictive. if you keep typing the same thing and it keeps giving you the exact same answer with the exact same language. >> protecting people from harmful advice while safely harnessing the power of a.i. is the challenge facing companies like woebot health and its

founder, alison darcy. >> there are going to be missteps if we try and move too quickly. and by big fear is that those missteps ultimately undermine public confidence in this ability of this tech. we have the ability to develop these technologies more thoughtfully. so, i hope we take it. welcome to cbs sports hq, presented by progressive insurance. >> hello. i'm adam zucker in glendale, arizona, as we prepare to crown a champion. undefeated south carolina won their third women's championship, despite 30 points from iowa star caitlin clark. and tomorrow night, defending champ uconn collides with purdue. the boilermakers looking for their first ever title. uconn is going for number six

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there may be no honor among thieves, but there are some ground rules. among them, don't steal what you can't turn around and sell. a gang of burglars from pennsylvania learned this the hard way. over the course of two decades, they snuck and smashed their way into a string of hallowed sports venues in small museums throughout the united states, making off with championship rings, jewel-studded belts, and dozens of trophies. but they couldn't fence their loot on the shadowy sports

memorabilia market without catching too much attention. so, what do you do once you've lifted yogi berra's world series rings? tonight the masterminds, having come clean to the authorities and served some time, gives up the game to "60 minutes." >> here he is, perhaps not the guy you'd cast as the lead in a heist movie. tommy trotta on a family pilgrimage to the baseball hall of fame. he wasn't just making memories that day. he was running reconnaissance. >> i would walk in these places and i would try to have either my niece or nephew. i would guide them over if i wanted to see a door or window, and i would film how far do i have to run after i get through this door. >> you're bringing the kids like you're bringing a tourist. >> get it on film, but not filming them, no. i want that window. i want that door. >> much like an athlete, he prepared for the job by spending hours watching tape. in his case, his own shaky footage of potential targets and the closest exit. >> needless to say, they do not suspect you are casing the

joint. >> not in a million years. i have a dorky look to me. i know this. i don't look like a criminal at all. >> he sure acted like one. here he is in 2012 after smashing through a window and into the u.s. golf museum in new jersey, he made off with ben hogan's trophies, middle of the night, unarmed. it was the m.o. he would replicate thousands of times, confounding investigators for years. >> certain fans really don't like me. >> now 48, trotta grew up outside scranton. a sports fan, baseball in particular. his grandparents took him to yankees games. he also grew up a thief. he says he still believed in santa when he began stealing, values, he says, he got from his late father. our first salmon trip, for example. my dad's from new jersey, not so much of a fisherman. everybody around us is catching

fish except us. so we sneak up to the hatchery at night. 3:00 in the morning, here we are with just nets and scooping them right out. all the salmon are coming up. sold a bunch of salmon. >> later on he ran with a crew of neighborhood friends who, in time, would become his alleged accomplices. he says they went from robbing pay phones to burglarizing homes. theft became his full-time jobs. marrying his two passions, trotta pulled his first sports heist in 1999. >> the master pitcher of all time. >> an exhibit devoted to hall of fame pitcher, christy mathewson, winner of 373 games, went on display at a nearby college. it featured a jersey commemorating the 1905 world series. the woman running the display allowed visitors, including trotta, to get up close. >> so, she opens up this little glass case, slides it, takes the jersey out, hands it to me. i'm holding the jersey. right away, my head's spinning. i'm thinking who i'm going to call and who's going to help me with this. it's only going to be on display a day.

>> it's spinning not because you're in awe of this. it's spinning because -- >> there's no time. >> why did you take the jersey? >> that's a good question, john. to have it, to try to sell it one day. of course it's priceless. >> what do you think you could have gotten for it? >> for how much attention on it, it's a real tough sell. even at 10% would have probably been over 100,000, just for somebody to look and maybe wear. i did wear it. i had it on. >> you had it on? >> yeah. i wanted to see -- i heard he was a big guy, christy mathewson. the fact he wore it -- i'm a big fan. i'm a fanatical baseball fan. >> and strikes him out. don larsen has pitched the first world series no hitter. >> what kind of fan would target yogi berra? the star catcher won a record ten world series rings. when he wasn't posing, yogi wore one and kept the other nine here in new jersey.

that is until a rainy night in 2014. trotta had been planning the job for months. >> the yogi berra cases were something special. it was a special kind of bullet proof glass that was never going to shatter. that's the one i had a grinder with a rescue blade, and i cut the cases open, reached and grabbed the rings, went to the other case, pyramid cut to get the two mvp plaques out also. >> alarm blaring, police were already on their way, as trotta ran across this field to meet his getaway driver. >> we were a second away from getting caught. get back to the house, laid the rings out. i wanted to try them on. >> did you? >> i tried them all on. i just put them on just to see. then the next thing we did, we start to dismantle them. >> what did you do with the rings? >> cut them, melted them. >> you heard right. trotta and crew retreated to this rural pennsylvania garage

to melt down yogi berra's rings. he says they melted down much of their loot, the stuff that was too hot to sell, and brought the gold and gemstones to manhattan's diamond district, where a dealer paid the gang in cash, no questioned asked. for all that priceless yogi berra memorabilia, trotta says they got $12,000. >> this is the museum. this is grandpa yogi. >> lindsay berra has devoted life to preserving the legacy of her beloved grandfather. the case went cold for years. meanwhile, the yankees replaced the stolen rings. eventually she came to learn what had become of the originals. >> i just burst into tears. it was so incomprehensible to me that that was the upshot of this whole thing. >> that these things no longer exist. >> that they've been destroyed. it made absolutely no sense to me. it still makes absolutely no sense to me, and i don't think it will ever make any sense to m. >> you valued the objects at more than a million dollars, and

you find out these have been melted down for about $12,000. >> yeah. it's baffling. and you go through all of this trouble to plan for months and then you sell the stuff that you steal for pennies compared to what it's actually worth? and not to mention the fact that you're destroying historical artifacts with significance so much beyond the gold and diamonds that they're made of. and it's callous and disrespectful and dumb. >> hard to argue. sports memorabilia may be a $25 million object, but demand dries up fast when the objects are so obviously stolen. >> what's the business model here? >> a quick 12,000. as bad as that sounds, i didn't look at it like rings. it was money. it was cash. >> so, you say you're doing this for the money. but it sounds like in some of these cases it wasn't about the money.

>> just to touch history a lot of times. >> i'm trying to reconcile. you clearly appreciate the history. but then -- >> i melt the stuff down. yeah. that was the lifestyle. this warped way of thinking, it was just normal for us. >> these are yogi berra's world series rings. >> believe me, that job -- of all the jobs, historical significance and the importance of these items, but that one bothered me out of most of them. >> that's saying something. in 2016, he drove to the roger maris museum in north dakota and stole the yankee sluggers mvp plaque. he never did hit coopers town, but at the boxing hall of fame, he lifted the belts of carmen basilio. at the harness racing museum in goshen new york, he took 13 trophies. as it turned out, trotta's biggest job didn't involve sports at all. it was set in his backyard and

came with unlikely entree into the art world. >> it really is a fortress, but they had kind of an achilles heel in the back of the museum. they had two glass doors. >> scranton everhart museum. houses taxidermy and folk art. it had two main attractions, andy warhol's "la grande passion" and "springs winter" by jackson pollock. >> get into the museum, pitch black. >> you know this place. >> know the place so good and open the door. to the right was the pollock and the warhol. basically blind folded i'm doing this. take them off the wall, run down the stairs, toss them in the back of the truck, tell those guys to go, and we were off to go. >> how did you know what to take? >> warhol is a big name. pollock is especially big. i've seen the pollock movie. >> did you realize the painting's value when you took it? >> no. i thought hundreds of thousands. >> try millions. but it was the same old story for this bunch.

they didn't have a buyer lined up, and it's hard to move prized artwork after a publicized theft. so, trotta says he and his crew hid the art along with the christy mathewson jersey, items they couldn't melt, at a home belonging to two of the alleged accomplices. >> when was the last time you saw the jackson pollock? >> last time i seen the pollock, 2017, 2018. it was at a house in union, new jersey. >> so, off we went to that house in union, new jersey. no answer at the door, no sign of the stolen art. still, when the ringleader gives directions to what he claims was a stash house, you know the plot is unraveling for the great american sports museum thieves. how they get caught? you know how it goes. the gang went bush league, got sloppy. here's 2016 surveillance video of trotta using a snowplow to rip an atm from a local grocery store. when trotta was pulled over for driving erratically two years later, police found his trunk filled with crime gear,

including gloves matched to that atm job. >> 30 years of secrecy, of stealth, and all of a sudden -- >> it's all down. >> what's that like for you? >> when it's over, it's over, you know? >> yes, he steals yogi berra's rings and mangles yogi berra's quotes. trotta was taken into custody. police began matching him to a string of home burglaries. inside a county jail, he made a deal. in exchange for reducing a sentence that could have spanned decades, trotta would lay out for investigators all those unsolved museum heists. he also gave up his long time crew, lookouts, get away drivers, and gold melters. the ringleader turned chief government witness. last summer federal and state authorities announced a sweeping indictment. >> 21 separate burglaries spanning more than 20 years across four states. >> eight of trottas alleged accomplices were charged with

conspiracy to commit theft of major artwork. four pleaded guilty. the other four pleaded not guilty. the indictment details, sadly, the melting of yogi berra's rings. it doesn't say what happened to the missing loot like the jersey, the warhol, the pollock. investigators declined to comment citing pending trials. we put the question to trotta, and in as much as a career thief can be believed -- >> do you have any idea where it is? >> no. right now, no. i don't think it's destroyed. nobody would be that stupid. it's probably going to pop up one day. >> tommy trotta finished serving his state sentence of more than four years last june. he's still working nights, but now at a warehouse. he's awaiting sentencing on a federal charge of theft of major artwork. >> how we justified it is, hey, nobody's getting hurt. i never looked at it like sitting in jail 51 months, emotionally, i destroy people. i know this now. >> fair sentence? >> i do regret hurting everybody

i stole anything from. the yogi berra family, what the -- everything he accomplished in life, he didn't need someone like me to do what i did. but it can't take away what he did. he's the hero. i'm not. i'm not. >> do you think yogi would forgive him? >> i mean, i kind of do. grandpa was such that if you owned up to your mistakes and you showed remorse, he would certainly forgive you. and i suppose i could do that. but i -- i'm still mad that the stuff is gone. a lesson in forgiveness, from the yogi/steinbrenner feud. >> it took 40 years. >> at 60minutesovertime.com. if you're like me, one of the millions suffering from pain caused by migraine, nurtec odt may help. it's the only medication that can treat a migraine

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now, "the last minute" of "60 minutes." >> international outrage of

israel's attack killing seven aid workers in gaza this past monday didn't fade during the week. the antihunger agency world central kitchen is familiar to "60 minutes" viewers. we have seen chef jose andres and his colleagues feeding the hungry in war and natural disasters across the world, in puerto rico, haiti, in ukraine, and here in the united states. monday's attack was no case of collateral damage. the three marked relief vehicles were targeted with precise aerial weapons. the workers coordinated their movements with the israeli defense forces. by the weekend, succumbing to pressure, including from the white house, israel dismissed two officers and disciplined three others for violating its rules of engagement and, quote, errors in decision making. i'm bill whitaker. we'll be back next week with another edition of "60 minutes."

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