weekend. what a terrifying week in oklahoma. the question is what are the lessons learned going forward. today i'll be talking to a doctor whose fast thinking saved dozens of her patients from that giant tornado. and what to make of jodi arias. a psychologist who has worked on more than 60 death cases and said her performance, quote-unquote was as strange as anything we've ever seen. and coca-cola say they're in the healthy lifestyle game. the chairman and ceo agreed to answer my questions. first up, oklahoma. you know the destruction i saw there was as complete as anything you might imagine. and i have seen disasters all over the world. the damage here was just so widespread. but although more than 2,000

people live in the exact path of the storm, 24 died, part of it was good warning. the alarms came in 16 minutes before the tornado hit, and part of it was knowing what to do. so i want you to watch this and maybe even grab a pencil and learn how to protect yourself. >> jump in when you guys are ready. 13 minutes. that's the average lead time you'd have if a tornado was headed your way. there's obviously no completely safe option during a tornado. your best bet is to get into the basement somewhere below ground level. but keep in mind that if you are there, you want to see what's on the floor above you as well. a refrigerator, a piece of heavy furniture could come crashing through the floor, so you want to be wary of that. and here in moore, oklahoma, not a lot of basements. studies have actually shown that there is another good option. take a look over here, an interior room or a closet like that can be the best place to be as well. the house is gone, but the

closet, preserved, even the clothes inside of that. remember, just got 13 minutes. so find that safe place. maybe grab a helmet or a bike helmet. throw some mattresses or a blanket over you to try to protect the head. one place you can't hide from a tornado is in your car. tornado strength winds can pick up a one to two-ton vehicle like this one and toss it around like you or i would a basketball. you don't want to be driving toward a tornado, but it's also a bad idea to be driving away from a tornado. it's hard to gauge the distance. if you must be driving, and the weather is clear, try driving at right angles to the tornado, perpendicular to get out of the path of the storm. there's another misconception that you should get out of your car and run underneath an overpass. what happens in a situation like this the wind is actually funneled, even more powerful than the storm, and there's also a lot of debris, and that debris can injure you. if you are stuck outside as a tornado approaches, find a ditch or any place far away from potentially dangerous objects

and vehicles and stay low. something else interesting that i learned, when tornadoes hit, typically half the injuries occur after the storm has already passed. as you might imagine, hazards range from downed and hidden power lines, to unstable debris, sharp objects, and i can also tell you no one is immune. this week when i was talking to the fire chief in moore, oklahoma, he had just stepped on a nail that went right into his foot. something else. moore medical center, spent a lot of time there, it's right in the middle of the map there at the top of the hurricane pathway. it was also squarely in the middle of the storm. at the time of the storm, there were 30 patients who had no choice but to hunker down and hope for the best. dr. stephanie barnhart was in charge of the e.r. when this all happened. on monday afternoon, 34-year-old e.r. doctor, stephanie barnhart had been watching the weather alerts. growing up in oklahoma, she knew that tornado warnings were common for this time of year, but this one felt different to her. when did you first recognize

that there was a problem? >> well, we had a very good alert system. the hospital was giving us what they call code black warnings. so we knew that, one, there was a possibility of a tornado. then they gave us another alert that there was one. and then the final alert was, one is nearby. >> if it's not on the ground, it's very close to it. >> you could definitely see that this is a developing situation, a developing tornado. you see it? there you see it. now it's on the ground. >> we all had to make the decision to go back into another area of the hospital, which is what we call our fast track or clinic area. and that is in the center of the hospital. we knew that the tv, there was a tv back there that we were watching, and it was within a couple of miles and the power went out. and at that time we knew that it was, we were hearing it, and we knew that it was coming for us. >> this is the moore medical building. if you look at that, it looks like it's just been bombed out. >> the tornado hit moore medical head-on, as it ripped through the building, barnhart's team

and the hospital's 30 patients used mattresses to protect themselves from falling debris. >> did you have any idea how bad this was going to be? i mean, it literally ripped a floor off of your hospital. >> even until now and when i got home, like i still didn't even have any -- you know, i had no idea what it was like. not until we stepped out of the hospital, that i even saw you know, across the way was a bowling alley that was to pieces. >> because of barnhart's quick thinking, not a single person was hurt. and seeing the extensive damage here, that's hard to believe. >> i just can't believe we walked out. >> people have written to thank barnhart. but she says she doesn't feel like she deserves the credit. everyone keeps asking when they look at these images, how is it possible that nobody got hurt in there. >> someone had to make the decision to move. and i guess that was me. but i don't want to take any credit for this by any means.

i know that, you know, it was god that was with us and we were protected. when i walk out of that place where we were, it was boarded by two sets of double doors. and one ceiling tile was it that was damaged. and then you know, we walk out and i see the rest of the hospital. i'm just -- i'm amazed. i can't even feel just how blessed we are that we walked out. >> and to find out what you can do to help victims of the oklahoma tornado, log on to cnn.com/impact. this week you may have seen this, actor brad pitt told "esquire" magazine that he's so terrible at remembering faces that he wants to be tested to see if he has a condition known as face blindness. it may sound odd to you, but i can tell you it's a real disorder. i had a chance to explore this with a famous neurologist, dr. oliver saks, who suffers from severe face blindness.

oliver saks may be a world-famous neurologist. but there's one simple thing, something important, something most of us take for granted that he can barely do at all. that's to recognize a face. even a famous one. >> this one. soft focus. the owner of this face is looking tough. but i -- i don't know who it is. sometimes i fail to recognize myself. >> even yourself? >> yes, i have occasionally started apologizing to a clumsy bearded man, only to realize that this is a mirror. >> he's face-blind. it's a rare and incurable condition that he's had since birth. saks suspects it's genetic since his brother suffers from the same condition. he can see each facial feature just fine, but putting it all together, that's the problem. >> how about this picture? >> that is very beautiful. a model or an actress. well, i suppose one thinks of marilyn monroe. >> i'm curious. you're looking at me right now. can you describe what you're

seeing? >> you have very beautiful white teeth. so i would recognize you especially by your teeth. >> you see, he finds a way, a way to adapt. >> i mean, now i've outed myself about face blindness. it makes it easier. >> would you want to be cured of this if you could? >> i think so. i think if i was suddenly presented with thousands of familiar, potentially familiar faces, i think this might overwhelm me. >> let me give you a quick word of explanation. let me show you on the brain model. this is the front of the brain over here, and this is the back of the brain. what happens is the visual system of the brain begins here in the back called the occipital lobe. it collects information and sends it to a different region, the parietal part of the brain where those pieces have to be turned into a coherent hole. in face blindness something goes wrong with that process of putting it all together. hope that makes sense.

next up another strange turn in the trial of jodi arias. what her statements to the court may say about her mental state. ♪ if loving you is wrong ♪ i don't wanna be right [ record scratch ] what?! it's not bad for you. it just tastes that way. [ female announcer ] honey nut cheerios cereal -- heart-healthy, whole grain oats. you can't go wrong loving it.

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my hair was past my waist, and i donated it to locks of love. if i'm allowed to live in prison, i will continue to donate to that organization for the rest of my life. i've received many requests from women to teach them spanish or american sign language. if i'm certain tensed to life, i'll be able to share my knowledge of those subjects with them. i would like to start a recycling program. i can help other women become literate so they, too, can add that dimension to their lives. >> that's jodi arias. essentially pleading for her life. she was asking the jury to sentence her to life in prison, instead of death. as you, i'm sure you know, she was convicted this month murdering her boyfriend, travis alexander. now, javier mador is a clinical psychologist. he's worked on more than 60 death penalty cases. welcome back to the show, javier. thanks for joining us. >> glad to be here. >> we haven't talked about jodi arias on this program.

but i got to tell you, that statement was so striking. it caught my attention. i know it caught yours as well. you've worked with a lot of defendants who are essentially in this position, begging for their lives. she seems off. i mean, i don't know what to make of it. what did you think? what were your impressions? >> everything about the death penalty phase of this trial seems very off. given my experience working on over 50 death penalty cases. first of all, you rarely, rarely see a defendant present their case as a witness which is what's happened here. you'll hear statements of remorse, statements of taking responsibility and so on. and even of asking for forgiveness that are very well thought out and worked on together with the defense attorneys. but in this case, jodi arias obviously has had a very tumultuous relationship with her defense attorneys. i've never seen anything like this. >> you're saying, suggesting her lawyers couldn't stop her. they have this tumultuous relationship.

but you also expect in some part during this trial that other people would have testified as well on her behalf. friends, family, people who knew her? >> sure. that's what typically happens. i mean, i've been involved in trials where school teachers from third grade will testify, aunts, uncles, parents. all of that may have indeed been on the table. but she clearly is, defense attorneys might say a difficult client to control. >> i want to get your impression of what you mean by off. but let me ask you this. you know just watching this again. is it possible that she's sort of to use the adage, crazy like the fox, that she's somehow trying to manipulate the court or the jury, that this is just an act or trying to get attention? >> if the prosecution expert is correct, and she has a borderline personality disorder, in some ways there's an immaturity at an emotional

level, a kind of self -- a sense of self-worth that's just gone. so you see these frantic attempts for attention. your comment about attention, that may in fact have been driving her motivation to do this more than anything else. that and all the media interviews she has given. which i can assure you there's not a defense attorney i have ever worked with, who would encourage a client facing the death penalty to do media interviews. so media attention and if she in fact does have this personality disorder, that may be driving a lot of this. >> that's an actual mental illness when you talk about borderline personality disorder. you're very good about not diagnosing people from afar. but did you think that's what this is? >> if you rely on the prosecution expert's diagnosis, borderline personality disorder affects about 3 million americans. the signs start in at lessens. we don't really know the cause, sanjay. there's a great number of studies in the last decade

suggesting neurobiological call differences, but also trauma in her childhood. if that's in her history, trauma at an early age in childhood, that didn't come out in her statement. maybe there's something there that she didn't want to have come out. >> that's fascinating. a lot of people are paying attention to it. appreciate having you on. always learn something. thank you. and coca-cola is under fire to be -- for selling junk forward. you've heard this before. they say they're going to be a leader in healthy living. the chairman and ceo of coca-cola joins me next. try zyrtec-d®. powerful relief of nasal congestion and other allergy symptoms -- all in one pill. zyrtec-d®. at the pharmacy counter. just like a tablet. so easy to use, it won a best of ces award from cnet. and it comes inside this beautifully crafted carrying case. introducing the all-new 2014 chevrolet impala with the available mylink system. ♪ [ beeps ]

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we talk a lot about the obesity epidemic on this program. well, today we're going to hear from the chairman and ceo of coca-cola who just launched what he calls glebl commitments to fight obesity. it's a pledge essentially to offer low and no calorie drinks in every market coke is sold and provide nutritional information including calorie counts, support physical activity programs and market responsibly, meaning no ads specifically aimed at children under 12 anywhere in the world. the head of coke made that announcement right here in atlanta alongside the mayor and the governor. what is driving this primarily would you say, mr. kent? is this fundamentally about the people around the world, this is fundamentally a corporation. how do you balance the bottom line with public health? >> sanjay, what is driving this

is the fact that we all know obesity is a complicated global societal problem and issue. and we in coca-cola have led for 127 years it is effectively 127th birthday, we're 127 years young today, and we want to lead. we want to offer an invitation also to partners who want to come and partner with us in helping to become a part of the solution for this very complicated and very important societal issue and challenge. >> do we have enough science, mr. kent, to help guide some of these decisions in terms of what is a healthy amount of activity lifestyle? what is the right diet? how do you sort of decide what you're going to recommend around the world and based on what science?

>> well, i think there is naturally important gains to be made through better evidence-based science. no question about that. i think the more we have of evidence-based science on this matter, the better for all of us. however, there is one simple fact. and that is energy balance. amount of calories people consume and amount of calories they spend. and i think we all know that taking in calories -- consuming calories is more fun than spending calories. therefore what all of this intends to do a little bit is to make spending calories also a little bit of fun, little bit of challenge, fun for communities around the world. >> you know, we talk a lot about the low and no calorie options that coke offers. and there's plenty of them. i'm curious, when we look forward maybe ten years, 15 years from now, will coke in the red can, the iconic coke, do you think that product's going to

change at all? there are some who say, look, sugar calories are different than other calories. all calories are not the same and therefore these sugary drinks have to change. do you think coke will change? >> i think the important thing to understand is that all calories count. and i think the important thing to understand is that we currently offer 3,500 products, those with calories, those with low amount of calories and those with no calories. and there is a place for all our beverages in an active healthy lifestyle that has a sensible diet, that has regular exercise and also that has a lifestyle that is associated with active healthy living. >> well, as you know, mr. kent, we have a shared interest in trying to make america and the world a healthier place. hopefully we'll be able to keep track of the progress. thank you so much for joining us. >> thank you very much for giving me the opportunity,

sanjay. thank you. >> and up next, fighting heart disease with stem cells. the future is coming. we've got one man's life's work. try zyrtec-d®. powerful relief of nasal congestion and other allergy symptoms -- all in one pill. zyrtec-d®. at the pharmacy counter. has a lot going on in her life. wife, mother, marathoner. but one day it's just gonna be james and her. so as their financial advisor, i'm helping them look at their complete financial picture -- even the money they've invested elsewhere -- to create a plan that can help weather all kinds of markets. because that's how they're getting ready, for all the things they want to do. [ female announcer ] when people talk, great things can happen. so start a conversation with an advisor who's fully invested in you. wells fargo advisors. together we'll go far. so i can't afford to have germy surfaces. but after one day's use, dishcloths can redeposit millions of germs. so ditch your dishcloth

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a talking train. this ge locomotive can tell you exactly where it is, what it's carrying, while using less fuel. delivering whatever the world needs, when it needs it. ♪ after all, what's the point of talking if you don't have something important to say? ♪ heart disease is the number one cause of death in the united states and in many places around the world. heart failure has been considered irreversible, but recently there have been some breakthrough trials using stem cells. they may have turned that notion on its head.

a key part of this whole thing is dr. roberto bali, he's a cardiologist born in italy and he found his life's work right here in the united states. >> the problem with the heart attack is that if certain region of the heart dies because of lack of oxygen and is replaced by a scar. they develop heart failure due to the loss of muscle. i was starting medical school and everybody else would start until recently, well, that's too bad. the first trial ever of cardiac stem cells ever in patients. and what we found was that already at four months after infusing these stem cells there was a remarkable improvement in the function of the heart.

for the first time we have therapy whose job is to replace new cardiac muscle. i think the stem cell evolution is going to produce a dramatic change in the way we practice medicine. i think it's the biggest revolution in medicine in our lifetime. and it really opens up a new exciting therapy that could revolutionize cardiovascular. >> you hear the phrase time equals brain when it comes to recognizing and treating strokes. basically the same is true of heart attacks as well. here are symptoms, chest pain, that's the most obvious. it can radiate to your left arm or neck and jaw, but not every heart attack causes chest pain, and that's especially true of

women. nausea, vomiting, feeling sweaty for no reason, sharp pains in your back. these symptoms can come on very quickly. if there's any doubt, call 9-1-1 or go to an e.r. immediately. american heart association also recommends chewing a non-coated adult aspirin as well. it could very well mean the difference between life and death. that's going to wrap things up for sjmd today. stay connected with me at cnn.com/sanjay. keep the conversation going on twitter. time for a check of your top stories making news right now. from cnn world headquarters in atlanta, this is "cnn sunday morning." flash floods have swallowed much of san antonio, texas. now word that two women are dead and authorities warn that count might go