particularly in the nfl. i turn my attention to high school players and what concussions can do to their young brains. i met a family who lost their son playing a game he loved. they made the remarkable decision to donate his brain. what scientists are learning from his brain is stunning. number 44, senior nathan styles is a spring hill broncos star runningback. >> if you watch him run, he had a flow about him that was just beautiful. i mean it looked so graceful. >> he's a starter on the varsity basketball team, a singer. ♪ >> the 2010 homecoming king is nathan styles. >> the broncos lost that game. the next day, nathan had headaches. no big deal until five days later when his mom receive add phone call. >> i got a call from the trainer at school sayi ining nathan is telling me he is still having headaches. you need to take him to the emergency room. i did. had a cat scan, nothing. >> he was out of play for a week. when he was ready to return, his mom was worried. >> he said mom, are you okay with this? >> i'm like, no, but it's his choice. nathan you want to play? >> yeah, i'm all right. yeah. i only got two games left. >> in the last game of the season, right after halftime, nathan went down. >> he collapsed on the sideline. the coaches were telling me to try to wake him up. he didn't. i heard him say he's seizuring. that was it. took him in the ambulance. we waited for life light. everything went bad from there. from bad to worse. >> 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. he 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. >> i called hundreds of families within 48 hours of their lived ones dying. it's never easy. >> chris is co-director of the brain bank. it's a project between the veteran's administration and boston yumpbt. they are looking inside the brain. after learning of his death, he called the styles. >> i felt it was the right thing to do. >> his doctor sent his brain to boston to be examined. she's examined hundreds of athlete's brains. she's found unnatural protein deposits. it's the same protein found in alzheimer's patients? is it caused by blows to the head? >> it's only seen in blows to the head. the youngest case to date is a 17-year-old. >> the brain of nathan styles. >> right. >> hi. >> hello. >> hi. ann mckey. how do you do? >> this is their first visit to the brain bank. >> what we have learned is it's a progressive disease. as the individual ages, if they are susceptible, it's a widespread disease affecting wide regions of the brain. >> it's from a concussion? >> probably more than one. >> no one believed there was a problem. >> until it was too late. for nathan, yeah. >> the styles met with me afterwards. >> what was that like, to sit there and talk to dr. mckee? >> it's my son. to see the pictures of his brain, that's -- >> it's a lot. >> yeah. it's a lot. something you don't wish on your worst enemy. >> 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. >> you can see more about this in the documentary i put together. it's about a teen in north carolina trying to turn tragedy into triumph. can you play a safer game and still win? it's called "big hits, broken dreams" sunday, january 29th here on cnn. football from another angle. danny, a rifle arm quarterback who won the heisman trophy, led the florida gators to the championship in 1996. later, he started a ministry. last year, he was hit by a rare disorder that literally knocked him off his feet. for danny, 1996 was a great year. he won the heisman trophy and led his team to the championship. deeply religious. he took his job as a role model seriously. >> when i was drafted to play with the saints in '97, i was looking for something in the city to be a part of. i didn't know what it was. i got introduced to desire street. >> he volunteers part time for seven years before he realized this, not the nfl was his true calling. >> i drove down my street. i had to turn right to keep practicing football and left to go to desire street. i got tired of turning right. >> leaving the money and fame of profootball was the biggest obstacle in his future. in 2007, his body took a hit harder than any from a line backer. >> i got out of bed, i almost fell over. we were in the inner city in montgomery working with a family there. we went to see their family doctor on a thursday. the next morning, someone knocks on my door at 5:00 a.m. it's this doctor. he said i think you have a sin drom. >> it's a rare disorder like multiple scler row sis. with rapid treatment and rehab, patients often get better and they do walk again. at his worst, he couldn't stand, couldn't walk. his infamous touchdown throwing arm was too weak to open a bottle of water. >> for a guy used to having gear five, six and seven if you need to it function with a couple gears has been difficult. >> several months after the diagnosis, he's recovered to the point he can walk and use his arms. he's still fatigued. he runs desire street ministries says the whole ordeal was a blessing in disguise. >> i needed to slow down to prioritize and think, i hope, that i'm a better husband and father. >> so good to see danny back up on his feet. sounds like there's lessons in there for all of us. mitt romney says the first thing he would do if he was president would get rid of obamacare. critics say it's the same as romneycare. which it is? we'll have it after the break. so who ordered the cereal that can help lower cholesterol and who ordered the yummy cereal? yummy. 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[ man ] still love that wind in my face! talk to your doctor. don't kid yourself about the risk of heart attack and stroke. if lipitor's been working for you, stay with it. lipitor may be available for as little as $4 a month with the lipitor co-pay card. terms and conditions apply. learn more at lipitorforyou.com. welcome. i understand you need a little help with your mortgage, want to avoid foreclosure. smart move. candy? um-- well, you know, you're in luck. we're experts in this sort of thing, mortgage rigamarole, whatnot. r-really? absolutely, and we guarantee results, you know, for a small fee, of course. such are the benefits of having a professional on your side. [whistles, chuckles] why don't we get a contract? who wants a contract? [honks horn] [circus music plays] here you go, pete. thanks, betty. we're out of toner. [circus music plays] sign it. come on. sign it. [honks horn] ...homes around the country. every single day, saving homes. we will talk it over... announcer: if you're facing foreclosure, make sure you're talking to the right people. speak with hud-approved housing counselors free of charge at... we're back with ""sgmd" x it's hard to believe it's been two years since an earth quake rocked haiti. the recovery process has been slow. we are seeing positive changes. roughly 500,000 people remain in tent cities. it's down from 1.5 million. 1.1 million children have a daily midday meal. there's so much that still needs to be done. the streets are filled with enough debris to fill five football stadiums. much of the housing people are in now is only semipermanent. we are dedicated to this. we want to make sure your donations are used to rebuild and help the people of haiti. the health care overhaul that mitt romney started in massachusetts got more attention than anything he did as governor. now, it gets mixed reaction. romneycare is a clone of the national health care plan or the opposite. which is it? >> obamacare, we'll get rid of it. it's bad law. >> many say it was modelled off mitt romney's 2006 health care plan in massachusetts. one economist who designed the romneycare and served as an adviser for obamacare is john than. >> at the core, they are the same plan. the basic goal of the massachusetts plan was to build on what worked with the health system and fill the cracks of the uninsured. >> both laws do share the same core foundation. most employers are required to provide coverage. expand medicaid and individuals are required to have insurance. romney hates the comparison. >> mandate is a seven letter word. is mandate -- should mandates be a part of reforming health care? >> you are not going to put people in jail for not having insurance. >> you could penalize them. >> nobody is talking about that. there are ways to encourage people. get a tax credit that you only get to use if you have insurance. >> there's another difference. it's easier to get free health care because the income guidelines are lower. it's primarily paid for with new taxes. >> do you want more of obamacare? >> no! >> do you want promises of higher taxes? >> no! >> you say he is lying or misleading people. what parts? >> 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 unfair to say i didn't have to raise taxes and ignore the fact he got a huge subsidy to make the bill possible. it's not possible at the national level. >> instead of imposing 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. >> people in massachusetts love their health care plan according to romney. 97% of them have insurance, the highest in the nation. you would say what happened in massachusetts was successful in terms of getting people who didn't have insurance insurance. is that correct? >> i think the bill had two goals, get the uninsured insured and fix a broken insurance. >> romney insists not every state is like massachusetts and his new goal is clear. >> the first on the list to get rid of is obamacare. >> there will be a lot of questions he'll be facing. we'll keep breaking it down for you as well. up next, the human lie detector. he taught me there's no such thing as a good liar. ♪ do you know what you want? ♪ while beating up on yesterday ♪ ♪ rolling on, moving on [ female announcer ] the space of a small suv. and more ways to connect to your world. ♪ do you know what you are? the all-new prius v from toyota. ♪ do you know? my son and i never missed opening day. but with copd making it hard to breathe, i thought those days might be over. so my doctor prescribed symbicort. it helps significantly improve my lung function, starting within 5 minutes. symbicort doesn't replace a rescue inhaler for sudden symptoms. with symbicort, today i'm breathing better, and that means... game on! symbicort is for copd, including chronic bronchitis and emphysema. it should not be taken more than twice a day. symbicort may increase your risk of lung infections, osteoporosis, and some eye problems. tell your doctor if you have a heart condition or high blood pressure before taking it. [ whistle ] with copd, i thought i might miss out on my favorite tradition. now symbicort significantly improves my lung function, starting within 5 minutes. and that makes a difference in my breathing. today i'm back with my favorite team. ask your doctor about symbicort. i got my first prescription free. call or click to learn more. [ male announcer ] if you can't afford your medication, astrazeneca may be able to help. you know, in the heat of a political race, there are lots of claims being made and counter claims as well. it got us thinking, how do you separate truth from fiction? how do you separate a lie. steve has worked with the l.a.p.d. he's so good, they call him the human lie detech to have. he says body language, behavioral cues are the best way to sniff out a liar. let's talk about the interviewer and interviewee. these criminals, pathological people, their entire behavior is different from the average person. they have a pathology. are they harder to detect in terms of their lies? >> that's a great question. often i'm asked, what do you think make the best liars, politicians and so on. my belief is pedophiles. they are good at victimizing their people. they are good at covering their tracks. there will be signs of leakage or seepage. what happens is, if you are going to lie, you need a great memory. you have to think, what have i said that could contradict me. if i asked you what you did this morning, you are relying on memory. you would be able to recall feelings, 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. you have to invent another two or three lie s s to protect yourself from the first one. truthful people, when they are recalling historical events speak in past tense because it's a historical event. they use tenses in some of the homicide cases i have been involved in in relation to disappearance of a child. usually you find parents talk in present tense. the anticipation or expectation is they will be returned alive, 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 be better liars by listens to you and reading about this? >> good question. typically you can try. at the end of the day, people still trip themselves up. it's interesting because language is how we communicate. if i'm talking to you or i want you to believe what i'm saying often there's a tiny slip up. people lie by omission. what they don't tell you is more important than what they do tell you. they don't lie, they edit the information. they are evasive. i'm sure you have done interviews, asked questions, sized up the issue they have answered with another issue. they are buying time. >> they answer it with another question. >> exactly. that means the question is the threatening stimulus. let me ask you a question. what year did you start medical school? >> 1993. >> what was your first job? >> i was a waiter. >> where was that? >> rams horn restaurant. >> you look to your, say, if you are accessing that part of your memory of recalling, looking to the right. one of the myths about lie busting is loss of eye contact is indicative of lying. that's not true. you are recalling information. people stare you down during a delivery. blink rate is six to eight times. it's like reaction. it's like got through that lie. >> so, looking off to the side is actually, you say that's normal. >> absolutely. >> you are recalling information. >> blink rate may increase after something tells a lie. >> how to benchmark a behavior then deviations. if you haven't benchmarked -- >> as the human lie detector, i know it's a cloakial name, is there anybody you think you couldn't with enough time and questions figure out if they are lying or not? >> look, as long as i have the ability to watch interviews then go in and ask questions. at the end of the day, you can try to anticipate what every question is. if you are fabricating and embellishing you don't have all the answers. that's the difference between an average interviewer and a good interviewer. coming from all different angles, i might ask you one question. sooner or later, if you are fabricating, you are going to trip up. >> fascinating guy. thanks so much. you know, you can't lie to yourself, though. a lot of people try to do it when it comes to your diet. we have help for you. that's next. lost your appetite for romance? 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! maybe you want to drop a few pounds or maybe just feel better. with all the diets out there, which is best for you. u.s. news and world report ranks 25 popular diets. the dash diet stands for dietary approaches to stop hypertension. the focus, chopping out excess sodium. preventing or reversing heart disease is the orange diet. it's plant based. i explored it in the last heart attack. sometimes sticking with a diet is the hardest part. many said weight watchers is the easiest of ul. think long term, yes, exercise, too. that's food for life. dad, why are you getting that? is there a prize in there? oh, there's a prize, all right. [ male announcer ] inside every box of cheerios are those great-tasting little o's made from carefully selected oats that can help lower cholesterol. is it a superhero? kinda. ♪ the 2012 consumer electronic show just wrapped up in las vegas on friday. this is a huge deal. about 150,000 exhibitors were there to check out the gizmos. hln was there. we have a look at some of the latest gadgets that help you get healthy. >> mario armstrong on the show floor here at ces in the digital health summit area. we have seen amazing things. we have seen mobile devices be able to check our glucose, our blood pressure, our heart rate and keep all that information so we can track it over time. we have seen how to use apps to share that information and store it online so our physicians, family and friends can get access to that info. even telemedicine. i was so amazed at how we can take doctors, medication and technology into areas where the expertise don't exist. >> you can have your device to measure your hel and activity with you all the time. you can have it on your smartphone, your watch if it's a smart device. those devices are connected. they don't just collect the information, they usually connect it to a service, an online service. flow the information there, track it over time. >> companies have a patch you can wear. a whole week straight. you can go in the shower with it. it's taking all your vitals and you can analyze it and live a more health conscious live style. >> geeks haven't been 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 shocking. schools all over the country are literally making students sick. how big a problem would you say air quality, indoor air quality in schools is to a students health? >> right now, the last estimates said about a third of our schools, about a third of our schools have some kind of problem that causes respiratory