welcome to "world news tonight." breaking news. the first case of ebola contracted here in america. a nurse who cared for the man who died in dallas. tonight, confirmed to have the deadly disease. how did this happen? what went wrong? and can we really stop ebola from spreading here at home? our dr. besser is here. extreme weather. the most powerful storm this year baring down. the tropical system in the atlantic. is one about to become a hurricane? and the severe storms heading our way. the forecast, just ahead. no joke. the prank that's happened to some of the biggest names in hollywood, now, the latest victim, this albuquerque woman. police with assault rifles circling her home. that terrifying 911 call. >> okay, please don't have them

shoot me. and, america's funniest. from that very first mom caught in a dishwasher. >> get off of me! >> to the dog being attacked by his own leg. tonight, the secrets behind the show that's had us laughing for 25 years. good evening and thanks for joining us on this sunday evening. i'm cecilia vega. as we come on the air tonight, the cdc has just confirmed that a dallas nurse who treated that liberian man who died from ebola has herself contracted the virus. this is that hospital, once again, at the center of it all. that's where that nurse is in isolation tonight. and this video just coming in. workers in hazmat suits, spraying her front door, disinfecting everything. this latest case even sending president obama into the oval office today for a briefing by phone. and now, serious questions about whether american hospitals are really prepared to stop this

epidemic. abc's ryan owens starts us off tonight. ryan? good evening to you. >> reporter: cecilia, good evening to you. really a stunning turn of events here a nurse at this hospital now a patient. she's in stable condition, but this was not supposed to happen. thomas eric duncan may have died, but the virus he brought to the united states lives on. tonight, a nurse in her twenties who cared for the ebola patient in this dallas hospital has tested positive. >> that health care worker is a heroic person who provided care to mr. duncan. >> reporter: the hospital says the nurse was wearing full protective gear while treating duncan in quarantine. somehow, she got infected, anyway. and tonight, the cdc warns, she may not be the only one. >> unfortunately, it is possible in the coming days that we will see additional cases of ebola. this is because the health care workers who cared for this

individual may have had a breach of the same nail sure of the individual who appears now to have a preliminary positive test. >> reporter: the nurse started having symptoms, namely a fever, friday night. she drove herself to her own hospital. within 90 minutes, she was in isolation. late saturday night, the ebola test came back positive. the nurse was not in the group of 48 people in dallas that are being monitored, because she came into contact with duncan only after he was in quarantine. tonight, disease detectives are retracing her last steps. who did she have close contact with? right now, they think just one person, who has been isolated. they will also try to answer that critical question -- how does a nurse, following cdc guidelines, wearing a face mask, two layers of gloves, show shoe covers, leg covers, still get infected? we know some hospitals go even further, with hooded tyvek suits, taping gloves to sleeves and suits to boots, so not a fraction of skin is exposed.

tonight, the same crews that decontaminated duncan's apartment are working on the nurse's. health officials are passing out information door to door. neighbors within a four-block radius of her building woke up to this reverse 911 call. >> please be advised that a health care worker who lives in your area has tested positive for the ebola virus. >> reporter: these neighbors aren't taking any chances. they share a dumpster with the nurse. >> definitely scary being in dallas but then when it's like, right here, it's a little bit alarming. >> reporter: and one more twist in this case. the nurse actually has a dog that lives with her in that apartment. tonight, health officials here are scrambling to figure out what to do with that dog. it's worth pointing out that dozens of other people here in dallas that have been monitored for symptoms, no one is showing them at this time. cecilia? >> ryan owens from dallas tonight. thank you. and abc's chief medical editor dr. richard besser is

here. the cdc has been saying all along there are protocols in place to prevent this. are hospitals ready for this epidemic? >> reporter: i don't really think that are. it's not so easy to do this correctly. take a look and see what was involved when i went into the ebola ward in liberia. several people suited me up. they made sure that every spot of skun was covered. and then coming out, the critical point. they made sure that they sprayed me down as i took off every layer of clothing. you need to be able to train, to practice and be supervised. it's not easy. >> you've seen it there firsthand. what should hospitals, if anything, be doing differently here at home? >> reporter: well, every hospital has to be ready to receive someone who may have ebola. so, they have to ask about travel. if they're suspicious, they need to isolate and test. but at that point, if they have ebola, they need to think about transferring to one of the four hospitals in america who are trained for this. there's one in nebraska. one in montana, one in maryland and one in georgia. this is what they do right. the cdc said they're thinking about a new change and i think that's a good idea. >> dr. besser, thank you very much. and now, to missouri, where this

weekend, thousands are marching in the streets in a second day of rallies after last week's fatal shooting of a black teen by an offduty officer. police in riot gear faesing off with protesters in st. louis once again. and our steve osunsami is there as tensions boil over. >> reporter: take a look. this was the peaceful protest outside ferguson police headquarters. they were in this officer's face, questioning his blackness. >> how can you stand for that as a black man? >> reporter: it got even uglier across town on the tough side of st. louis. young people furious over the latest shooting death of 18-year-old vonderrit myers. marched to the closest quick trip -- >> what are you doing? >> reporter: blocked the entrance and refused to leave. police arrested 17 people and threw tear gas. >> close your eyes. >> reporter: quick trip convenience stores have become a rallying point in the protests

against police. after unarmed 18-year-old michael brown was shot and killed by a white police officer in august, they burned this one down. this weekend, brown's mother led a march from her son's memorial in ferguson to one of several demonstrations. a grand jury is still deciding whether the officer who shot him dead will face any charges. police in st. louis say the myers shooting is different. they say the teen had a gun and a record and fired three to four shots at the offduty officer who killed him. >> all of it is fabricated. every bit of it. >> reporter: families here say police are demonizing the young man who was killed right here just last week. but police say that test results on gun powder residue could come back as soon as tomorrow, proving the teen not only had a gun, but used it. cecilia? >> steve 0 sun samosunsami, on once again for us. thank you. and now, to some extreme weather starting with the storm we've been tracking all week, the biggest one on the planet so far this year. super typhoon vongfong.

it slammed into okinawa, japan, with winds up to 110 miles an hour. the u.s. military warning those 25,000 troops serving there to stay indoors until the storm passes. and nearby in the atlantic, tropical storm faye lashed the tourist mecca of bermuda. the wind and rain knocking out power to half of the country. abc's senior meteorologist rob marciano is here now, to, faye is out, something else is coming in. >> reporter: yes, the very quiet hurricane season has gotten a lot louder. this is tropical storm rapidly intensifying. it could very well be a hurricane as it passes near or over puerto rico tomorrow night. and then likely peeling off away from the u.s. mainland. >> there is a severe weather threat here at home. >> reporter: there is. it all comes from a system that actually triggered this. look at this shot. a water spout over the puget sound. this is the first time in 44 years the national weather service out of seattle has had to issue a tornado warning. no damage there. but we could see damage tonight and for the next 48 hours. tonight, dallas, northeast texas, oklahoma city. then the threat shifts eastward

and expanding. houston, new orleans, all the way up to indianapolis, over 40 million people in the severe storm zone tomorrow. >> okay, rob, we're ready for it. thank you very much. now, overseas, to that battle against isis. it has been a weekend of new u.s. air strikes, but america's highest ranking military officer acknowledged today, those air strikes have failed to stop isis from advancing. and now, the terror group is changing the way it fights. here's abc's alex marquardt. >> reporter: tonight, the northern syrian city of kobani is surrounded by isis militants who have now battled their way in. u.s. officials warning its capture could be imminent. over 200,000 residents have fled across the border into turkey. the u.n. has warned of a possible massacre of those who remain. some 50 u.s.-led air strikes against isis positions in the past week have failed to stop their advance. and chairman of the joint chiefs of staff general martin dempsey acknowledged in an interview with abc's martha raddatz that

isis is now changing tactics. >> the enemy adapts and they'll be harder to target, yeah. they know how to maneuver and how to use populations and concealment. >> reporter: the general also revealed today that isis in iraq had come within 15 miles of baghdad's airport. so close that the u.s. had to call in apache attack helicopters for the first time. general dempsey warned that he expects to start seeing isis firing into baghdad from nearby positions. he says, for now, there are no immediate plan for u.s. ground troops in iraq, but said the role of u.s. military advisers there may have to evolve with the fighting. cecilia? >> alex, thank you. and now, back here at home, to a festive fall tradition that took a deadly turn in an instant. a halloween-themed hayride flup flipped over on a steep hill in maine, killing a teenage girl and injuring more than 20 others. tonight, some of those juries are serious and we're told the

driver of a small jeep picking that flat bed trailer missed a sharp turn. the trailer jackknifed and went off the road. at a halloween festival in new hampshire, another frightening scene. two toddlers trapped inside a bouncy house that was swept away by a gust of wind. the 2-year-old and 3-year-old brothers are now hospitalized. the younger of them, in critical condition. here's abc's bazi kanani. >> reporter: what should have been a fun fall festival turned into a nightmare. two toddlers climbing into this bouncy house while it was in a restricted area, supposed to be off-limits. then, a gust of wind. >> as soon as it went up, it just kind of flipped and came straight down. >> reporter: the bouncy house flying up to 30 feet in the air before crashing down into this new hampshire apple orchard. a 2-year-old boy airlifted with critical injuries. a 3-year-old also hospitalized. >> oh, my god. >> reporter: it's a horrifying scenario we've seen before. two siblings injured when this inflatable slide tumbled 300

feet across a field this summer. just weeks earlier, two other seriously hurt when this bouncy castle set sail. tonight, the farm owners say this bouncy house was not ready for use. >> it wasn't open to the public. it was unfortunate, two kids get into it. >> reporter: experts say it's one more stark reminder that these popular children's attractions must always be secured to the ground and supervised. bazi kanani, abc news, washington. and in sayreville, new jersey, this was supposed to be homecoming weekend. instead, this small town rocked by a high school hazing scandal. the football season called off, seven players under arrest, accused of locker room attacks, some of them sexual in nature, on younger players. tonight, a vigil outside that school, parents, students, the whole town trying to make sense of it. abc's linsey davis has the story. >> reporter: tonight, seven players on the sayreville high

school football team are facing criminal charges. aggravated sexual assault, aggravated assault and criminal restraint in an alleged hazing case that has rocked this new jersey town and prompted the school district to cancel the season. >> and we have not had enough respect. >> reporter: before charges were filed and the extent of the allegations revealed, angry students and parents confronted school board members. >> kids who didn't do anything are suffering. >> reporter: but the superintendent stood firm, saying the hazing allegations demanded a strong response. >> one or two courageous kids that stepped up and did the right thing and they prevented one less child from being harassed, intimidated and bullied. >> reporter: experts say even if teammates don't take part in the assaults themselves, they're often aware of what's going on. why punish the group for the acts of a few? >> the group has to understand that if you are going to be a team and you're going to haze in order to be a member of the team, you have to take the consequences as a team. >> reporter: the sayreville students ranging from 15 to 17

years old could be facing jail time. less than a year if tried as juveniles, but more than 30 years if tried as adults. linsey davis, abc news, new york. and still ahead tonight, police raiding unsuspecting homes. the rich and tape mouse are no the rich and famous are no longer the only targets of that dangerous prank, s.w.a.t.ing. bogus phone calls leading to frightening police raids. what one woman says happened at her home, all because of a fake call. and later, daredevils at it again. this time, taking a flying leap and not landing on the ground. what happened next, talk about making a huge splash. goodnight. goodnight. for those kept awake by pain the night is anything but good. introducing new aleve pm.

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it has happened to some of the biggest names in hollywood. and now that dangerous prank, s.w.a.t.ing, is showing up on the doorsteps of homes across america. police in new mexico ordering

one terrified homeowner out with her hands up. here's abc's brandi hitt. >> oh my god! he's pointing it right at me! i've got my hands up! >> reporter: you're watching police, wearing body cameras, surrounding an albuquerque woman's home in the middle of the afternoon, guns drawn. >> looks like i saw maybe some kind of movement in the front window. >> reporter: officers taking cover behind the family car. assault rifles trained on a very confused homeowner. >> they're asking that you step out with your hands in the air. >> okay, please don't have them shoot me. >> reporter: and it's all because of a fake 911 call. >> so, it's either i kill my baby or i get $20,000 so i can get more heroin. >> reporter: she is the latest victim of s.w.a.t.ing. pranksters who disguise their phone numbers, then call 911, triggering police raids on innocent victims. >> we got a call that there was a man inside the residence, at your house, that he had killed his wife and he was getting ready to kill his children, okay? that's why we're here today.

>> reporter: tonight, police are searching for the person behind this bogus call. first targeting celebrities like miley cyrus, justin beiber and ashton kutcher, s.w.a.t.ing has now gone mainstream. the fbi estimating there are now roughly 400 s.w.a.t.ing calls each year. how much is this costing law enforcement agencies? >> i believe this is costing law enforcement and public safety agencies hundreds of thousands over the course of the year. >> reporter: and law enforcement is now cracking down on s.w.a.t.ing nationwide. punishments ranging from a few months behind bars to one teen now serving an 11-year prison sentence. brandi hitt, abc news, los angeles. and still ahead, the last thing you ever want to happen while stuck in a new york city traffic jam. the drama in the backseat of a cab, and why one uncle will always have a special bond with his new nephew. our "instant index" up next. i had these very burning, needle-like sensations.

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starting with a bizarre security scare here in new york city. people sitting around eating, enjoying a fall day when a mystery man pops out of a subway grating and tossed a smoke bomb into a restaurant, causing diners to panic. no one was injured, but the man vanished right back down that same subway grating. authorities tonight want to cash catch this guy. we move on now to one giant leap for party crashers everywhere. professional base jumpers, right there on the ledge and, of course, those cameras were ready. the jumpers leaping off an 1,100-foot tower. but rather than plunge to the ground, they aimed for a party at a roof top pool and, well, yeah, you guessed it, all three jumpers making a huge splash. looks like fun. don't try that one at home. now, to the baby boy born in a new york minute. the kind of drama you usually only see in movies like "look who's talking." but not for sarah steinhouse. who jumped in a cab when her water broke, only to get stuck in traffic.

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well, they make for some pretty funny home videos. here's abc's chris connelly. >> my hair is caught in the become of the dishwasher. >> reporter: it was this video, selected best clip 25 years ago. on the first ever episode of "america's funniest home videos." what always works? >> groin hits are particularly funny. pinata whacks. birthdays are always a disaster. >> there's that dog. who keeps thinking he's being attacked by his hind leg. >> reporter: once, the show would receive 36 mail bags of vhs tapes a week. now, staffers zip through thousands of videos, uploaded daily. >> that's fabulous. don't have to pay a royalty for that. wow. >> reporter: bob saget was the show's original host. >> saget was wonderful at doing the funny voices over the clips. >> pushing a rock. pushing a rock. pushing a rock. pushing a rock.

pushing a rock. pushing a rock. pushing a rock. turning around. >> reporter: for the last 15 years, it's been butter smooth tom bergeron in charge. why do you think this show endures as everything around it changes, technology and viewing habits change? >> i think, chiefly, it's slapstick from your neighbors. you go back to the days of charlie chaplin and buster keaton, those things still hold up. >> reporter: or, just waiting for the rinse cycle. >> get off of me! >> reporter: chris connelly, abc news, los angeles. >> how do you get your hair stuck in a dishwasher? "america's funniest home videos" 25th season premieres tonight here on abc. "gma" first thing in the morning. david is back tomorrow. have a good evening. thanks for joining us.

bergeron: here's a sneak peek at tonight's 25th season premiere of "afv." aah! ooh! woman: put your arms down lower, j-- oh! [ cellphone rings ] [ gasps ] aah! [ glass shatters ] get in! [ man laughs ] welcome to the season premiere of "america's funniest home videos." and now here he is, the host of "afv"... together: tom bergeron! [ cheers and applause ]