finally, another young woman is wearing the miss america crown this morning. >> ladies and gentlemen, your miss america 2012 is miss wisconsin. >> well, since she lovely? 23-year-old miss wisconsin, she is being crowned miss america. she sings opera and mentors children of incarcerated parents. we wish her all the best. good morning. i'm dr. sanjay gupta. here's what we have in store this morning. romney care versus obamacare. what's the difference? a former heisman trophy win and quarterback is struck by a rare paralyzing disease. and the human lie detector.

this man says it's impossible to trick it. first, as you probably know by now, i've reported a lot on concussions in football, particularly in the nfl. recently i turned my attention to high school players and what can concussion kz do to their young brains. during my investigation i met a family who lost their son playing this game that he loved, and they made this remarkable decision to donate his brain and what scientists are learning from his brain is stunning. number 44, senior nathan styles is a star running back for the broncos. >> if you would watch him run, he had a flow about him that was just beautiful. i mean, it looked so graceful. >> reporter: nathan is also a starter on the varsity basketball team, a singer. ♪ >> the 2010 homecoming king is nathan stiles. >> he is the toast of spring hill, kansas.

the broncos lost that game, and the next day nathan had headaches. no big deal until five days later when his mom connie received a phone call. >> i got a call from the trainer at school saying nathan is telling me he is still having headaches. you need to go take him to the emergency room. so i did. he had a cat scan. nothing. >> reporter: the doctor kept nathan out of play for three weeks. when he was ready to return, his mom was worried. >> i remember him looking at me, and he goes, now, mom, are you okay with this? i'm, like, you know, with him going back to football, i'm, like, oh, no, but it's his choice. nathan, you want to play? yeah, i'm all right. yeah. i only got two games left. >> reporter: but in the last game of the season right after halftime nathan went down. >> he had collapsed on the sideline and the coaches were telling me to try to wake him up and he didn't. then i heard him say he is seizuring, and then that was it.

we took him in the ambulance and waited for life flight and everything went bad from there. from bad to worse. >> reporter: after hours of surgery, doctors stopped the bleeding in nathan's brain. by then his lungs and heart were too weak to keep him alive. nathan died. the cause? second impact syndrome. a condition that occurs when a player is hit too soon after a concussion. it primarily impacts younger athletes. >> we got calls of hundreds of families within hours of their loved one dying, and it's never ease where i. >> reporter: chris n owinski is president -- between the veterans administration and boston university to better nabbed concussions they are looking inside the brain. after reading about nathan's death, he called the stiles. >> deep down i felt like it was the right thing do do.

>> so nathan's doctors sent his brain to boston to be examined by dr. ann mckee. she's examined nearly 100 athletes' brains, and in a frightening number of cases she has found unnatural protein deposits. those are the same types of proteins found in alzheimer's patients. >> what we're seeing here, is this definitely caused by blows to the head? >> it's never been seen in any reported case except in a case of repeated blows to the head. the youngest case, to date, is a 17-year-old. >> the brain of nathan stiles? >> which is nathan stiles, right. ♪ >> hi. >> hello. >> welcome. chris n owinski. >> this is the stiles' first visit to the brain bank. >> what we've learned in the last three years is that it's a progressive disease, and then as the individual ages, if they're susceptible to this disease, it really becomes a widespread disease affecting large regions of the brain.

>> so all of this was because of a concussion? >> probably more than one concussion. probably some concussive hits too. >> no one believed there was a problem until they were able to show -- >> until it was too late. yeah. for nathan, yeah. >> the stiles met with me afterwards. >> what was that like to sit there and talk to dr. mckee? what was -- >> you know, it's my son. to see the pictures of his brain, that's -- >> that's a lot. >> yeah. yeah, that's a lot. something you don't wish on your worst enemy. >> which i think the good thing is you can see every effort is being made to learn from it. i think nathan is helping to come up with a plan to maybe what to do with concussions. >> hmm. can you see more about this in the documentary that i put together. it's about a team in north carolina trying to turn tragedy into triumph. the question keeps coming up. can you play a safer game and

still win? it's called big hits, broken dreams, sunday, january 29th right here on cnn. we have football from another angle. danny warfahl, remember him, he was a rifle arm quarterback that won the heisman trophy, led the florida gators to in a national championship back in 1996. later after six years in the nfl he started a ministry. last year he was hit by this rare disorder that literally knocked him off his feet. for danny 1996 was a great year. the university of florida quarterback won the heisman trophy and led his team to the national championship. deeply religious, he took his job as a role model seriously. >> when i was drafted by mike ditka to play with the saints in 1997, i was looking for something in the city to be a part of, but i really didn't know what it was. that's when i got introduced to desire street. >> desire street minimum industries was working in the

poorest areas of new orleans. he volunteered part-time for seven years before he realized this, not the nfl, was his true calling. >> drive down my street, and i would have to turn right to keep practicing football and turn left to go to desire street, and i got tired of turning right. >> reporter: leaving the money and fame of pro football wouldn't prove to be the biggest obstacle in his future. early in 2011 his body took a hit way harder than any from a linebacker. >> i got out of bed, and when i landed on my feet, i almost fell over, and we were staying in the inner city of montgomery working with a family there and staying there and so we went to see their family doctor on a thursday. the next morning someone knocks on my door at 5:00 a.m., and it's this doctor. he said i think you may have -- >> it's a rare neurodegenerative disorder like multiple sclerosis. it can lead to paralysis and is life-threatening. with rapid treatment and rehab,

patients do walk again and get better. at his worst he says he couldn't stand, couldn't walk. his infamous touchdown throwing arm was too weak to even open a bottle of water. >> for a guy who is used to having gear five and six and seven if you need it, to try to function with just a couple gears has been difficult. >> reporter: now, several months after his diagnosis, he has recovered to the point where he can walk and use his arms, but is he still incredibly fatigued. warfahl who now runs desire street minimum industries says the whole ordeal was a blessing in disguise. >> really needed slow down to reprioriti sdwl e and think. i hope that i'm a better husband and father. >> so good to see dan question back up on his feet, and it sounds like there are some lessons in there for all of us. mitt romney says the first thing he would do if elected president is get rid of what he calls obamacare. his critics say, listen, i the same thing as romneycare.

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and your mood is on its way down. you might not just be getting older. you might have a treatable condition called low testosterone or low t. millions of men, forty-five or older, may have low t. so talk to your doctor about low t. hey, michael! [ male announcer ] and step out of the shadows. hi! how are you? [ male announcer ] learn more at isitlowt.com. [ laughs ] hey! man on tv: ...rbis and 36 homers. swings at the first pitch and fouls it deep back into the stands. [ding] [fans whirring] announcer: chill raw and prepared foods promptly. one in 6 americans will get sick from food poisoning this year. check your steps at foodsafety.gov. we're back with sgmd. it's been two years since the massive earthquake that rocked haiti. i saw it firsthand, and it claimed 315,000 lives, injuring 300,000 more people. i will tell you, the recovery process has been slow, but we are seeing positive changes.

roughly half a million people, a large number, remain in tent cities, but that's down from 1.5 million two years ago. aid organizations on the ground are providing 1.1 million children with a daily midday meal. there's so much that still needs to be done. the streets are still filled with enough debris to fill five football stadiums and much of the housing that people are in now is only semi-permanent. we're dedicated to this. we'll continue to monitor the progress and also make sure your donations are used to rebuild and help the people of haiti. the health care overhaul that mitt romney led in massachusetts has probably got more attention than anything else he did as governor. now as he runs for president, it gets a mixed reaction. depending who you ask, romneycare is either a clone of the national health care plan or the complete opposite. which is it? >> obama care, we'll get rid of it. >> it's bad law. it's bad medicine. >>ry repeal obamacare. >> critics say that play was, in

fact, modelled off mitt romney himself's 2006 health care plan in massachusetts. one economist who helped design the so-called romneycare and also served as an advisor for obamacare is m.i.t.'s jonathan gruner. >> at their core they're really the same plan. basically, the basic goal of the massachusetts plan was to build on what worked with our health insurance system and to fill in the cracks to cover the uninsured and fix the broken market for individual insurance purchase. >> reporter: both laws do share the same core foundation. most employers are required to provide coverage. government programs like medicaid expanded to cover more people, and both plans require individuals to have insurance. it's an individual mandate. romney hates that comparison. >> the mandate is a seven-letter word, but many regard it as a four-letter word. should mandates be a part of reforming health care? >> well, you're not going to put people in jail for not having insurance. of course -- >> you penalize them. >> no one is talking about that.

there are various ways to encourage people to get insurance. one is to give everybody a tax credit that you only get to use if you have insurance. >> reporter: there is another important difference. it's also easier to get free health care under obama's plan because the income guidelines are lower. that's primarily paid for with new taxes. >> do you want more of obamacare? >> no! >> do you want promises of higher taxes? >> no clam. >> you said he is lying or at least misleading people. what part specifically? was there something you specifically took issue with what the governor said? >> first of all, he says, well, i didn't have to raise taxes and obama did. well, he didn't have to raise taxes because the federal government paid for his bill. it's really unfair for him to say, oh, gee, i didn't have to raise taxes and ignore the fact that he got a huge subsidy from the federal government to make that bill possible. clearly, that's not possible at the national level will. >> instead of having the federal government run them and impose on states how they work, i'm going to take those dollars and

those programs and give them back to the states and let states craft their own solutions to their own problems. >> reporter: people in massachusetts love their health care plan according to romney, and today the state says 98% have insurance. that's the highest in the nation. >> so you would say what happened in massachusetts was successful in terms of getting people who didn't have insurance getting them insurance. is that correct? did it accomplish its goals? >> i think the bill had two goals. it was to get the uninsured insured and did accomplish that goal, and it was to fix a broken individual insurance market. i can't emphasize this enough. >> reporter: romney insists not every state is like massachusetts and his new goal is clear. >> the first on the list to get rid of it obamacare. >> no question. there will still be a lot of questions that he will be facing. we'll make sure to keep breaking it down for you as well. up next, i'll introduce you to the human lie detector. he taught me there's no such thing as a good liar. when i grow up,

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the heat of the political race, there are lots of claims being made and counter claims as well, but it got us thinking, how do you separate truth from a fiction? how do you spot a lie? deception expert steve has worked on over 50 homicide dasz with the fbi and lapd. they call him the human lie detector. he says body language, behavioral cues can be the best way to sniff out a liar. >> so let's talk about both the interviewer and interviewee. let's start with the interviewee. there are some people, i imagine, for example, these criminals, these pathological people, their entire behavior, i imagine, is different than the average person. that they have some sort of pathology. are they harder to detect in term of their lies? >> that's a great question. i often get asked who do you think make the best liars, politicians and so forth? in my opinion the pedophiles. they literally live the lie.

they're re good at covering their talibani their tracks. there will be some telltale signs of leak allegeage or seepage. personally, have to think what have i said previously that could contradict me now? newerlogically, if i asked you what you did this morning, you would be relying on memory through sensory input, so you would be able to recall feelings, colors, conversations, tastes, smells, because you lived through conversations, tastes, smells because you lived through them. if i was interviewing you for a homicide and you said you were one place and you weren't, you have to fabricate and embellish those. for every one lie you told, you have to invent another two or three to cover the first one. not only that, but truthful people when recounting historical events will speak in past tense because it's a historical event. they'll use tenses in cases i've been involved in in relation to the death of a child. usu usually, parents will talk in

present tense. they won't say, i loved my child because the anticipation is they'll be returned safe and well. if a child has been abducted and a parent is talking in past tense soon after the disappearance, red flags go up. >> can people learn to become better liars by listening to you or reading about this? >> good question. typically, you can try, but at the end of the day, people still trip themselves up. it's interesting because language is what we use to communicate. if i'm talking to you or want you to believe what i'm saying, often, there will be a tiny slip up. people lie by omission. so often what they didn't tell you is more important than what they told you. and people may be evasive, dismissive. i'm sure you've done interviews before. you've asked a question, they sized up the issue, answered the question about another issue. >> answer with another question.

>> exactly. what that means is the question has become the threatening stimulus. let me ask you a question. what year did you start medical school? >> 1983. >> and what was your very first job? >> i was a waiter. >> and do you remember where that was? >> rams horn restaurant. >> what happened then is you looked to your right. if you're accessing that part of your memory, recalling, looking to your right. one of the myths about lie busting is loss of eye contact is indicative of deception. that's not true because you looked away before you answered the question. that tells me you're recalling information. research shows that people stare you down following the delivery of a deception. but they'll blink six to eight times after. it's almost like reaction and relief. it's like, oh, i got through that lie. >> so looking off to the side is -- you say that's normal. you're recalling information. blink rate is something that may increase after someone tells a lie.

>> what i teach people is how to benchmark a behavior and look for deviations from that behavior. if you haven't benchmarked, you're not going to see changes thereafter. >> as a human lie detector -- i know it's a colloquial name -- is there anybody with enough time and questions that you couldn't figure out if they're lying or not? >> as long as i have the ability to watch interviews and go in and ask the questions. because at the end of the day, you can try to anticipate what the question is. if you're fabricating or embellishing, you don't have the answers. so you can't anticipate every question i'm going to ask you. that's the difference between an average interview and a good interview. coming from all different angles, i might ask you one question. sooner or later, if you're fabricating, not relying on memory, you're going to trip up. >> fascinating guy. steve, thanks so much. you can't lie to yourself, which is what a lot of people try to do what it comes to their diet.

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maybe you want to drop a few pounds or maybe just feel better. with all the diets out there, which one is best for you? "u.s. news and world report" ranked 20 popular diets. top overall, the dash diet. it stands for dietary approaches to stop hypertension. the process chopping out extra sodiumment for preventing heart disease, u.s. news likes the ornish diet. it's a plant based diet. i explored this in the last heart attack. sometimes sticking with a diet with the hardest part. and the magazine said weight watchers is the easiest diet of all to follow.

with any diet, think long term. yes, exercise too. that's food for life. e using a food thermometer. 3,000 americans will die from food poisoning this year. check your steps at foodsafety.gov.

the 2012 consumer electronics show just wrapped up in las vegas on friday. this is a huge deal. about 150,000 exhibitors and attendees all there to check out

the newest gizmos. among the people there, hln's digital lifestyle expert mario armstro armstrong. he's got a look at the latest gadgets that can help you get healthy. >> reporter: mario armstrong on the floor here at ces in the digital health summit area. a big area about technology, health, and fitness. we've seen some amazing things. we've seen mobile devices be able to check our glucose, check our blood pressure, our heart rate, and keep all that information so we can track it over time. and we've seen how we can use apps to share that information and store it online so that physicians, family and friends, and distant relatives can get access to that info. even telemedicine. i was so amazed at how we can now take medication and technology into areas where these technologies don't exist. you can have your device to measure your health, measure activity with you all the time.

you can use a smart phone or a smart device, and those devices are connected. they don't just collect the information, they use it to connect it to a service, an online service on your computer. you flow the information and track it over time. >> we see companies having a patch you can wear a whole week straight. you can go into the shower with it, and it's taking all your vitals, and you can analyze it and just live a more health conscious lifestyle. >> i think technology companies are starting to finally wise up. geeks haven't been traditionally the healthiest group of people on the face of the planet. there's another story i want to tell you about this morning, something i found pretty shocking, which is that schools all over the country are literally making students sick. how big of a problem would you say air quality, indoor air quality, is to a student's health? >> right now estimates are about one-third of our schools