investigators give us an affidavit because we don't want people to overstep boundaries especially when we think about the nsa and we think about how much our information is shared. there's this fine line between privacy and protection, but more crimes are happening online and it's, you know, this is a digital landscape now. >> casey, laurie, thank you very much. we appreciate it. >> thanks. dr. sanjay gupta talks weed right now. hello and welcome. ipads and tablet computers they are so ubiquitous nowadays and you might have noticed that children even babies are immediately drawn to that screen. but how young is too young? and is in any of it good for them? i'll show you what i learned. also the most important thing that people tend to overlook when they're trying to get healthy and lose weight. but, first, my investigation on weed. ♪ people are lighting up all over

the country. >> whoo! >> they call it the green rush. marijuana has moved out of the back alleys and into the open. >> happy cannabis, club, you all. >> in some states it's legal to grow, to sell, to smoke. and marijuana could be legalized in a city near you. so, easy to get, and many think so harmless. but when the smoke clears, is marijuana bad for you? or could pot actually be good for you? you know, i came in with a lot of questions on this topic and i tell you, i traveled all over the world to try and get some answers as well. i even went to israel where they literally have patients using marijuana as a treatment right in the hospital. of course, i did spend a lot of my time in the united states. i spent time in colorado where they recently passed a lawmaking marijuana legal for all adults. on one hand, i went to a treatment center where the director of that center says he literally cried after that vote was passed. he saw nothing but trouble.

but i also met people, even children, who are being saved -- saved -- literally by marijuana as a medicine. it's literally the only thing that helps them, in some cases they have life threatening diseases. on a personal note i've done somewhat of a turnaround on this. i used to take a very negative view of marijuana like a lot of doctors do, but i think in many cases we have been actevel and terribly misled and i think at a minimum it's an intriguing medicine that is helping patients right now and is certainly deserving study. all that said, i understand the concerns and i've been looking in to those as well. one big one i can tell you that many people think that marijuana is different today than a generation ago. they say it's stronger, a lot stronger. >> see the barbed wire obviously on the fences. >> here on the campus of the country's oldest universities, ole miss, a huge stash of marijuana is under lock and key. >> this was our vault. >> this is some pretty tight

security. look at this doctor. this doctor runs what's called the marijuana potency project it. what's the potency of this? >> this is about 8%. >> for three decades now his lab has analyzed weed confiscated from drug pusts. >> this is 36% thc. you can smell it. has a good arrowmatic smell. >> how much does this worry you, 36% tch confiscated? >> very, very dangerous material. you take some of this and they'll go into the negative effects of the high of the thc, the psychosis and the irritability and the paranoia and all of this. >> while not all the plants are this high there's no question he's seeing a trend. in 1972 the average potency was less than 1% thc. now, it's nearly 13%. are people becoming more obsessed with high thc

marijuana? >> i think so. i think they are. >> and for my documentary on weed i also just spoke with dr. julie holland who is a psychologist and expert on cannabis and the editor of "the pot book." the higher levels of thc in marijuana today versus the '60s and '70s, is this more toxic to their brains today than it was 30, 40 years ago? >> well, it could be more toxic to your thinking or your behavior. like, for instance, seizures, you know, low-dose thc prevents seizures, but high-dose thc can actually induce seizures. same thing with nausea and vomiting. you know, there's a wide range of thc that will stop nausea, vomiting, but if you really go to the ultrahigh thcs or the synthetics, then you can induce vomiting. so, dose does matter.

too much of a good thing. it's very disoriented to have high-dose thc, and you can become paranoid and disorganized thinking and you can get disoriented. you can be uncomfortable and it can lead to panic attacks or anxiety attacks in people who aren't that comfortable being separated from reality even if it's for 15 or 30 minutes. >> like any drug, cannabis can have different effects depending on whether it's smoked, eaten or taken in other ways. putting aside kids for a second, do you worry about it for adults if it's not smoked? >> the problem with eating cannabis is it can be really altering and very, very strong. one thing that happens when you eat cannabis is that your liver metabolizes thc into 11 hydroxy thc and that's very psychedelic. it's very, very altering and sometimes you don't feel it coming on for two hours and you end up eating more. sometimes the dose with these

edibles and, you know, half a cookie or a quarter of a cookie and i don't know 20 people that can eat just half a cookie, so there's really a risk of having too much when people use orals. but the risk is that you'll stop breathing or die, the risk is that you'll become very altered and disoriented and sometimes, you know, you can get anxious and panicky in that situation. >> there's also the question of addiction. compared about other drugs marijuana is not highly addictive. the most widely cited number, 9% of users go on to become dependent. that's compared to 23% with heroin, 17% with cocaine, 15% with alcohol. but could the more potent pot change the equation? with the amount of thc being so high, much higher than it was 30, 40 years ago, it can be more addictive, you say. >> you know, this -- the 9% rate of people getting addicted to cannabis, i don't -- it's a pretty old number, so my assumption is that it's based on sort of weaker pot than we have

now. so, you know, we -- i do keep hearing about with these, you know, with the skunk or, like, the higher thc strains that people are getting into more trouble with compulsive use, so it's my assumption that higher thc percentages can lead to more addictive behavior. >> so, you hear all that and the question is, is marijuana bad for you? can pot actually do some good? you're going to see what led to some of my own change of heart tomorrow night 8:00 p.m. eastern right here on cnn. and still ahead, babies on the ipad. what's educational? what's not? but next, good news for travelers and billions of people around the world because a potential new malaria vaccine. we've got details coming up. is loaded with protein! ney i'll believe it when i--- [ both ] oooooh... [ female announcer ] as you get older, protein is an important part of staying active and strong. ensure high protein... fifty percent of your daily value of protein. low fat and five grams of sugars. [ major nutrition ] ensure! nutrition in charge!

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you know, there was a big headline this week about a new vaccine against malaria. this could be big stuff. that's the disease that kills in pretty high numbers, 660,000 people died in 2010 alone.

most of them african children. 219 million people are sickened worldwide every year. joining me to talk about this is cnn pentagon correspondent barbara starr. barbara, great to have you on the show. thanks for joining us. given that you're the pentagon correspondent reporting this, gives us some idea of where this is all coming from, but who made this announcement? >> well, actually, it came from the u.s. navnavy, along with th national institutes of health and a pharmaceutical company. they've been working on it for some time, and even the bill and melinda gates foundation that you know so well has been involved in some of this work. it's important for the u.s. troops around the world and they encounter malaria very often. basically what they've done in this very small study is achieve 100% protection against malaria, very small population, but it's a real beginning and if they can scale it up, if they can get some large-scale testing done, if they can get it licensed, get it into production, it may be something that makes a real

difference. >> yeah. i mean, you've probably taken some of the existing drugs to prevent malaria in all your travels. i know i have. and there can be some side effects, fda, i don't know if you heard this, barbara, issued a warning about malaria saying it could have permanent side effects, it's a common medication to take to prevent malaria. are they talking about potential side effects from this vaccine? >> what they tell me is because it's a vaccine as opposed to a pill which is what we all take when we travel overseas, they really do believe there will be much less side effects, essentially a live agent. so, it won't have, they hope, they don't believe, the same types of side effects. now, look, they do have to did a lot more research, a lot more trials, a lot more studies, but it's that key thing that in a very small sample they got 100% protection. and what they want to do now is build off of that and see where they can take this program. >> i mean, do we have any idea

when this might -- what it might cost? when it might actually be a real option for people? >> well, the company, we are told, hopes to get into the fda licensing process in the next three to five years. as for the cost, they don't know yet. nobody's really got the data on that. and as i said, other entities like the gates foundation are also working on similar programs. so, i suspect, sanjay, if some of this research comes together from a lot of different areas, we may see some additional advances in all of this. >> fascinating stuff. thanks so much for bringing it to us. >> sure. >> great to have you on the program. coming up, you've probably seen the pitch, learning tools and tech nologies to make your baby smarter. who doesn't want that? but first of all, "the human factor." cattle bells, pull-ups, sit-ups, squats, just completing a cross-fit workout is impressive for anyone.

but for steph hammerman, the feat is more than impressive, it once was inconceivable. >> i was born three months premature. i lost a lot of oxygen and a bunch of blood through that process. >> steph has cerebral palsy and that develops after trauma to the brain during or after birth. now, people with the condition are often unsteady on their feet. they have impaired motor function, muscle coordination problems, and all of this could make cross-fit training dangerous. but for steph, it's just another obstacle to overcome. >> all of my other brothers and sisters are completely able-bodied and growing up in that world, there was no -- there was no other way to live. >> she was always active, but the inevitable freshman fit team in college really made her want to get in shape. >> i found a gym. i walked in and i said i want to become stronger. i hear cross is awesome. would i be able to do this? >> within an hour she was hitting the mats. with each push-up, she got

stronger. with each pull-up, more intense. >> i'm determined to prove not only to the world but to myself that i'm good enough to do this. >> not only is she good enough to do it, she's now good enough to coach. >> fight for it, guys, let's go. >> earlier this year she became the world's first certified cross-fit trainer with cerebral palsy. >> there's no reason in this world that people have to say they can't do something. if somebody really wants to do something, they're going to find a way to make it work. mom, dad told me that cheerios is good for your heart, is that true? says here that cheerios has whole grain oats that can help remove some cholesterol, and that's heart healthy. ♪ [ dad ] jan? f-f-f-f-f-f-f. lac-lac-lac.

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i think i can safely say that every new parent wants to entertain but also educate their baby. and technology being the way that it is, there's a lot of apps out there, some promising help, like this one, this is one we've used for our youngest child recently it's called let's count. basically you play this game and it's -- >> let's play. >> and basically you sort of go through it and you go through and it's pretty simple, but, again, for a young child this could be something quite influential, this and other types of apps are pitched as influential, but they argue that this and many other apps are not what they claim to be. >> "b," "f," "g." >> jodie fratz is a busy mom of three and sometimes she knows she can rely on these simple apps to help 20-month-old steeger have some fun.

>> makers of these apps say they're not only fun but also educational. with claims like teaches numbers and counting 1 to 10, first words, and action reaction. >> if we're choosing, i'd rather have an educational app than just something that's empty calories. >> but the consumer advocacy group campaign for educational childhood, said it's false advertising and they filed a complaint with the federal trade commission on wednesday. >> it's kind of like the wild west out there and there needs to be some kind of regulation of the claims that they make. >> previous complaints from the same group led to disney withdrawing claims about the popular baby einstein series and also a $180 million settlement from another toy maker. >> it's not fair to parents to claim that something's educational when, in fact, there's no evidence that it is. >> according to the campaign, there have been nearly 3 million downloads of fisher-price's laugh and learn apps. in an e-mail statement to cnn

fisher-price said development of our toys begins with one goal, to create age-appropriate toys for the way children play, discover and grow. open solutions, they also stood by their product in an e-mail telling cnn, we think we have apps that can help parents with babies either by entertaining babies or helping them to see new things, animals, hear their sounds, et cetera. >> you feel a little less guilty about letting them use if it's something that's educational, but i don't think anyone thinks it's a substitute for parents and teachers. >> joining me is ari brown back to the show an author of the baby "411 series." back in 2007 she actually wrote the american academy of pediatrics position paper which said no screen time smaller than 2. i have small children, i paid attention to the paper, welcome back to the show, doctor. >> thank you so much for having me. >> what do you make about the claims that the apps are claimed to be educational and this complaint about the fact that there's no evidence of that?

>> i think the complaint stems from the fact that it's importance to have truth in advertising and truthfully we don't have any science that shows that these products are educational, so parents need to be informed consumers about what they're purchasing and whether we know whether they're educational or not, and the answer is, the truth is, we don't know. >> yeah, you know, and it's tough, i guess when you look at these things like baby einstein and stuff, i always sort of assume it's not going to make my kid an einstein, obviously, but could it -- is it helpful at all? >> and that's a great question. and unfortunately, technology goes a lot faster than the pace of science, and so researchers are looking at that very question right now. does interactive media have a role in educating our kids, particularly our youngest kids. >> and, you know, and it is changing fast. i mean, a lot of these apps are very new. i mean, i have three young girls, as i mentioned, a lot of these apps weren't around when they were younger. is there a different concern about the impact of these kind of apps on children's development? you've written about screen time

before. what about the ipad apps? >> well, you know, when the american academy of pediatrics came out with the policy statement in 2011, when that policy statement was written, ipads didn't even exist and so we were really looking at passive media use, so screen time for kids where they were sitting watching a tell vitezed program whether it would be on a traditional tv screen or a smaller tablet screen and what we knew then was that there was no benefit educationally for that type of a program, and there was a concern for risk. but when it comes to interactive media, you know, nobody knows that answer. there may be a benefit. the one thing i can say that's really important for families to know is that although these things can be virtual approximations of games that we all played as kids and things that, you know, maybe kids can learn phonics and maybe kids can learn math skills and such, but you're never going to be able to replace the ability for a child to learn by putting two blocks

in her hand. you know, put two blocks in your daughter's hands and let her figure out how to stack them on top of each other and kids really need that unstructured play time to stimulate problem solving skills and creativity and they also need social interaction and talking to mom and dad and watching mom and dad is tremendously powerful. >> you know, it's interesting because my youngest right now has this game where she -- on her ipad where she matches all the states and then she has a puzzle as well where she actually puts the states into the right position on the map, it's interesting, i thought the ipad app did a lot of that but the actual tactile putting the blocks together may make a bigger difference. you know, let me ask you this, because a lot of parents out there, myself included, the science isn't there yet, so what do you tell the parents, you know, the parents of your patients when they ask should i let my kids play with these apps now, what is the right answer? >> the take-home message for parents is this -- everything in moderation. so if you are going to let your child spend some time doing interactive app, make sure they're not spending too much

time in front of a screen and make sure that they're having a healthy balance of other activities. >> i think that's always good advice, you know, you know, we try and do our best as parents but sometimes those screens are just -- they're so testing to give us a little bit more time. but dr. ari brown, i appreciate your time, thank you. >> thanks so much. and as if new parents don't have enough to worry about, there's also lack of sleep. we're still going through this in our family. a new study finds that sleep may be the key to staying fit. we'll explain, after the break. stay with us. ille parent and charlotte parent magazines, along with the mayors of those cities, in the fit family challenge. a community wide program that offers free classes that inspire families to get out, enjoy moving together, and even track their activity online. it's part of our goal to inspire more than three million people to rediscover the joy of being active this summer. see the difference all of us can make... together.

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you know, we're about a month away now from the malibu triathlon. kind of scary. six of our fewers on the fit nation team along with me and some of my staff will be swimming half a mile in the pacific ocean, biking 18 miles along the pacific coast highway and running four miles on the beach, it will be the couplemy nation of seven months of intense training. i can tell you it's changing each one of our teammates from sedentary to fit, happy and healthy. they're doing really great. can't wait to see all of them, at the finish line. when it comes to getting fit, people always talk about diet and exercise, obviously very important things but a new study reminds another key to being healthy is getting a good night's sleep. not only does sleep give you the energy you need, it also gives you the willpower to not reach for that bag of chips the following day. let me sho