Nfl poster boys, from tom brady to cam newton, why is it that the quarterback always seems to be so good looking . As we count down to the super bowl, the surpsing Science Behind their sex appeal. Good morning, america, on this thursday. Robin on assignment. A lot to get to. You should have seen the look on michaels face when amy asked how good looking quarterbacks are. How good looking are they . Not that good lking to me. Only way they look good to me when they were in my way and i got a chance to hit them. Other than that, not that good looking. Its your job to mess up their face. This is actually a real story, the cover of Sports Illustrated. Its a real story, a real phenomenon and we will ler answer the question. All right. So youll weighn a little more, right . Why are quarterbacks so attractive. Film with the helmet off. The rest of us look good. Take the helmet off. Look at this, people. Okay. Things are a little tense here. Theyre tense up in New Hampshire, as well. Those attacks are ramping up two days before the next gop debate right here on abc. Donald trump still on top in the latest polls, marco rubio is on the move and in the crosshairs. Well have all the latest and that scary moment for donald trump coming up. But first t we want get to the massive storm that is sweeping across the country, more tornadoes touching down in the southeast wednesday and then take a look at this Surveillance Video from a high school in the school damaged by the storm there for us this morning. Good morning, steve. Reporter good morning to you, amy. This is whats left of the football coachs office at that high school at Crockett County high in tennessee. Its destroyed. The ceiling is now on the floor. This morning the National Weather service says the tornado that hit here on tuesday was an wind speeds of up to 95 miles an hour, enough to rip the roof off this building and several others here. Classes here are now canceled for the rest of this week. A torna warning hasas been issued. Reporter for the secon night in a row tornadoes rained down on families in parts of the south. It looks like its almost splitting into two. Reporter this one recorded on cell phone tearing through ft. Stewart, georgia, the u. S. Military base near savannah. Sirens and warnings blared on loudspeakers. Abandon vehicles and d trlers. Reporter frightened parents and children couldnt believe their eyes. Oh, my god, taking the roof off houses. Are we going to die . Reporter this morning they have to mo 50 people to new homes. Dozens of vehicles destroyed and in south carolina, there were reports of tornadoes there too and it wasnt just the high winds, the storm brought heavy rain. Lots of it. The will to live kept her hanging on. Reporter in nashville and rescued from flash floods and take a look at this from a surveillance camera they gave us at Crockett County high in tennessee near that coachs office. You can see the moment a tornado tore through this school esday. Everybody was gone home and that saved lives. Yes, no doubt. Reporter theyre working through the night and hope to have classes open back up by monday. George. We sure hope so. Okay, steve, thanks very much. Boy, its tough down there. The race for president now, your voice, your vote and just two days before our big gop debate brandnew poll out moments ago shows Donald Trump Holding on to a 20point lead in New Hampshire over marco rubio and ted cruz as two more candidates drop out of the race and trump accuses cruz of stealing the Iowa Caucuses so theres a whole lot happening. Abcs tom llamas tracking all thlatest from manchester. Reporter good morning. So many developmpments on gop side, senator rand paul dropping out, santorum dropping out endorsing senator marco rubio and as you just said, donald cruz of stealing the Iowa Caucuses while also arning there are some dangers to campaigning. We have an inbound emergency runway is going to be shut down. Reporter overnight a scarere in the air for donald trump. Trump force one forced to make an Emergency Landing in nashville because of a mechanical problem. Runway 20, right cleared. Reporter hitting his campaign s stop in ltle rock eventually. My guys said, oh, thats okay, we can go back to new york, mr. Trump. Well come another day, i said, theres no way. I love arkansas. Reporter theres also no stopping trumps new attack claiming senator ted cruz cheated his way to victory in iowa. What he did to ben carson was a disgrace that he had quit the race. Everyone knew he didnt quit the race. Reporter referring to this cruzampaign email sent on caucus day, they cite a press report saying dr. Carson is taking time off after iowa. It goes on to say please inform any carson caucusgoers of this ted cruz. Its not a mistake. He did it on purpose. Reporter carson says it hurt his chances in iowa and hes calling for accountability. At least those people who are responsible should come out publicly and admit what they did. Reporter cruz apologized to carson but is standing by his campaigns actions. Will you fire or suspend anyone at your campaign for putting out misinformation. No, were not going to scapegoat anybody and i would note that the news story that our team passed onon was truand accurate. Cnn reported it. Reporter but is it a dirty trick to conse voters . Is it a dirty trick to pass on your news story . Youre in the business. Would you think it was if i forwarded an abc news story or just a dirty trick to pass on cnn stories . Reporter cruz lashing out at trump saying the billionaire is stirring the pot because he lost in iowa. Well, listen, it is no surprise that donald is throwing yet other temper tantrum or if you like another trumper tantrum. Christie is keeping the pressure on senator marco rubio, christie warning of the dangers of f electingng anotherirst term senator. Fool me once shame on you, fool me twice, shame on me. Reporter now, governor christie part of that pool of governors that right now is sort of at the bottom of the polls along with jeb bush and governoror jo kasich, all campaigning very hard in New Hampshire hoping for a ticket to south carolina. George. Okay, tom, thanks very much. Chs christie does join us now from keene, New Hampshire, this morning. Youre saying marco rubio is barack obama . What im saying, george, hes a first term United States senator and has had no experience at all of ever managing anything. And that weve tried that once before and republicans have watched over the last seven years as the president has made this government more and more dysfunctional. We need to make sure we nominate someone who not only can beat Hillary Clinton but also can manage the government and get it back on the right track once United States, no need to take those chances, george, on someone whos never managed anything larger than a 30person senate staff. Marco says youre lashing out because youre losing. Hes in second place, youre stuck at 5 in sixth place right now. George, you know, marco can say whatever hwants about that but this is his experience or lack thereof. He just doesnt have any experience, george. All he has is experience of being a legislator. Weve tried that as a part and as a country and it doesnt work. Youve been hitting him etty consistently for the last several days. Is that pretty muca concession that if you dont beat him on tuesday its t the end othe line for you . No, its not a a concessi to that at all, george. But what it is is trying to raise a really important issue for New Hampshire voters as we get to go to the polls. Fact is, we ne to make sure we have a candidate who actually knows what there doing. We need to have a candidate who is willing to take questions from the press in an unguarded that does more than 45minute driveby town Hall Meetings and marco rubio has been the most prototected coled candidate in the race so what i said before is let the boy come out of the bubble. Lets see what he can take, because as you know the heat hell get from Hillary Clinton if he was ever the nominee will be much greater than anything any of us can throw at him. We have this controversy brewing about the Iowa Caucuses. Dold trump and ben carson lashing out at ted cruz suggesting that he stole the Iowa Caucuses, merit to that argument . I dont think so. U know, i dont think any time in politics when you lose and you ask for a doover thats lot of confidence in your leadadership ality. The results are the results. You move on and try to win the next and stop focusing on the rearview mirror. Hard on New Hampshire. Done town hall meeting after town hall meeting making the case now for several months but do appear to be stuck right now. Just keep working, george. Thats how you do it. You keep working, do well in the debate on saturday night. I will tell you this, you look at the polls that were going into iowa, the polls, the last onthe Des Moines Register was wrong on donald trump and tecruz by nine points and wrong with marco rubio by eight points. This has been difficult to race to poll and i know youre obsessed with polls. You want them every day and question everything on polls but the fact is you all were saying donald trump was a winner over the weekend, that he was definitely going to win the Iowa Caucuses. And then it turns out he loses so im not going to get into that game with you, george. Its like when people vote well knowow what haens and make decisions based off that butf we made decisions based offer the polls that you guys were counting on on sunday, we would have given donald trump the win and this thing would be in a much different direction. Well see you saturday night. Thanks, governor. Looking forward to it, george. George now to the democrats and Hillary Clinton and Bernie Sanders facing some tough questions at a town hall last night. They are, of course, preparing for a big debate tonight and Abcs Cecilia Vega is in manchester with the latest on all of that. Good morning to you, cecilia. Reporter amy, go morning to you. Bernie sanders may have the big lead in the polls here but that is not stopping hillary inton from trying to mark her turf right here in his own backyard. Overnight Hillary Clinton on the hot seat. Defending the big bucks she received for paid speeches. Did youave to be paid 75,000 . Well, i dont know. Thats what they offered. Reporter even brbringing bk that famous s phrase. Do you still believe theres s a vast right wing conspiracy . Dont you . Im asking you. Yeah. Its gotten even better funded. Reporter and clinton still hounded by the one question that just wont seem to go away. What will you do to regain that trust . As clearly as i can who i am, what i stand for and what ive always done. Reporter in Bernie Sanders own backyard the vermo senator not holding back either. We are taking on the most powerful Political Organization in the country and thats, you know, the clinton organization. Reporter but now just days away from the nations first primary, clinton and sanders both looking to the future. And sande and clinton will face off in a debate tonight right here in New Hampshire. The dnc announcing there will be six more debates between now and may 1. So in flint, michigan, amy that means this race on this democratic side will not end any time soon. All right, cecilia, thanks so ch. The democrats are tonighbut the next Republican Debate is just two days away and world news tonight anchor david muiuir and this week coanchor Martha Raddatz will moderate it right here on abc, george. We move on to get the latest spreading to florida where the governor has declared a state of emergency in four counties and ground zero fofor the oureak, brazil, is struggling to contain it with prominent voices now calling for this summers olympics to be cancelled. Our dr. Richard besser is on the scene in brazil right now. Good morning, rich. Reporter good morning, george. Every four years we look forward to the Olympic Games and the world coming together. But this year its different and thats why Health Officials are so concerned because when the world comes together during a viraral epidem, when people go home they may not go home alone. With millions of tourists in rio for the start of brazils carnival tomorrow and millions more expected this summer for the Olympic Games, controlling the zika crisis is more urgent than ever. [ speaking a Foreign Language ] overnight brazils president saying the virus has gone from a distant nightmare to a real threat. The government scrambling to start developing a vaccine but until one is ready, she says, mosquito prevention is their whether brazil can get zika under control by the summer are calling for the rio olympics to be canceled. I dont know that its up to doing the olympics and epidemic control at the samame time. Mosquitoes are a tough opponent. Reporter the u. S. Olympic committee tells abc news it is keeping a close eye on the situatn and that team usa participants will be made aware of the recommendations regarding travel there especially for olympic athletes like Michael Phelps whose pregnant fiancee is among the people worried. Zika has been linked to a severe birth defect. While the u. S. Womens soccer team is focusing on qualifying for the rio olympics, head coach jill ellis tells the Dallas Morning News the zika outbreak is concerning. Over the next two weeks brazil has a trial run for what crowds can do. Its carnival season so visitors are coming from around the globe and also mosquito season when people return home well see what happens to the zika george and amy. Certainly is a lot of questions to be answered there now to a big security headline. Isis sympathizers in germany overnight. Authorities conducted raids in three cities including berlin and theyve arrested two men and a woman with alleged ties to an Algerian Group linked to isis and suspected of plotting attacks in germany. And then security, of course, tight t in the u. As we get ready for the super bowl. The big game just three days away. That is a live look at levis stadium in santa clara, california, around 75,000 people will be packing in there sunday night and abcs Pierre Thomas has a look at how the fbi and Homeland Security are making sure everyone stays safe. Reporter from this heavily Armed Tactical Team preparing to confront terrorists were not going to be too far away. From any large crowds. Reporter to the coast guard deploying speeoats for guns that fire these bullets, no one taking any chances with this years super bowl. The potential threat of terror real and present. We try to anticipate things that could happen from multiple Different Directions but were always informed by recent events. Repeporter surity always tight for the big game, but this year a joint fbi Homeland Security threaassessment specifically points to the paris attacks where a stadium full of fans was targeted and the San Bernardino massacre as evidence of what could d happen ding the super bowl. I think the achilles heel for us is either an active shooter or a lone wolf terrorist event. Reporter bombsniffing dogs and Undercover Police already everywhere and monitors searching for chemical and biological weapons have been secretly deployed. Ese xray machines are checking every item being delivered from the food to beyonces wardrobe for the halftime show. Dung the game, military and Border Protection blkhawks will patrol the skies hunting for menacing planes and a new potential threat, drones. So many out there, the faa released this super bowl video warning. But leave your dronone at hom reporter no drones allowed within 32 miles of the super bowl, no one taking any chances. Amy. All right, pierre, thanks so much. We all know the panthers are getting ready for the big game and another animal in the panther family is making headlines. Jaguar. Love that transition . Yes. Caught on camera, michael. Panthers not the jaguars, a real one called el jefe spanish for the boss. Hes earned that nickname. He is caught on video, the only known wild jaguar in the United States and was seen hence the song one is the loneliest number. Its okay to be one because they know jaguars prefer to be alone. They prefer to hunt alone. They prefer to livalone. They believe hes about seven that they hope a female jaguar will cross the border from mexico, keep el jefe some company and inurn boost the population in the process. We want more jaguars in this country. We only have one. Were just tryinto hook him up need a little hole inin the fence. Theres an app for that. Hs lonely. He needs a me every once in a while. I know if he does get a mate hes no longer going to be the boss. Thats the way it works around here. Temperatures in the upper 50s, yesterday very warm across the northeast but weve got this wave developing along the front and cold air coming in. Challenging forecast could see snow tomorrow for the morning commute, new york, i9and england. Coming up next on gma, murder of that young girl in virginia. C