at for more than a year now. growing evidence repeated blows to the head, the kind you get on the football field can have lasting rep recushions. a law take effect in california. a player who gets a concussion must be cleared by a trainer or doctor before going back on the field. the risk is hard to gauge. you can t see damage to the brain unless you actually look inside. of course by then, it s too late. football is a violent game, full of big hits. what are all those collisions doing to the brain inside the helmets? i met with kevin, he s a researcher from the university of north carolina. he can measure the intensity of the hits. a moderate hit and see what happens. it s recorded up here at 23.6 gs of acceleration. he won a grant for his work on concussions in football. he s going to with stand an impact 157 gs. wow. it s similar to a car accident. right. the question is how many of those big impacts can a player with stand over the course of a season orca rear b
cancer-causing agents and because of the vicinity and the children that are involved. you didn t care. these parents have every reason to be angry. the children s school had toxic chemicals and even worse, they were the last to know. prescription for cheating. they read our x-rays, but the investigation reveals a disturbing question over the certification of many radiologists. isn t it cheating? revealing investigations. fascinating characters. stories with impact. this is cnn properties with your host tonight, brooke baldwin and dr. sanjay gupta. we begin with a rare look in anonymous. they are the shadowy and motley group of hackers and activists. drawn together by love of internet mischief. they are evolving into the movement of social change behind the wall street occupiers. they are hated by corporate security, but hunted by the fbi. one of the questions is who are these people and why are they taking to the streets? to get some answers, we step into the shad
because of the vicinity and the children that are involved, you didn t care. reporter: these parents have every reason to be angry. their children s school had toxic chemicals and even worse, they were the last to know. prescription for cheating. they read our x-rays, but a cnn investigation reveals a disturbing question over the certification of many radiologists. isn t it cheating? revealing investigations, fascinating characters, stories with impact. this is cnn presents, with your host tonight, brooke baldwin and dr. sanjay gupta. we begin tonight with a rare look inside anonymous. they re this shadowy and motley group of hackers who answer to none, drawn together by love of internet mischief. now they re evolving into this movement of social change. a real driving force behind the wall street occupiers. they re hated by security and hunted by the fbi. one of the questions we re asking is who are these people and why are they taking to the streets? to get
storing chemicals that were cancer-causing agents, and because of the vicinity and the children that are involved, you didn t care. reporter: these parents have every reason to be angry. their children s school had toxic chemicals and even worse, they were the last to know. prescription for cheating. they read our x-rays, but a cnn investigation reveals a disturbing question over the certification of many radiologists. isn t it cheating? revealing investigations, fascinating characters, stories with impact. this is cnn presents, with your host tonight, brooke baldwin and dr. sanjay gupta. we begin tonight with a rare look inside anonymous. they re this shadowy and motley group of hackers who answer to none, drawn together by love of internet mischief. now they re evolving into this movement of social change. a real driving force behind the wall street occupiers. they re hated by security and hunted by the fbi. one of the questions we re asking is who are these
there was a building that was scoring chemicals and cancer causing agents and because of the vicinity and the children that are involved, you didn t care. these parents have every reason to be angry. their children s school had toxic chemicals and even worse, they were the last to know. prescription for cheating. they read our exx rays but we reveal a disturbing revelation about many radiologists. revealing investigations, fascinating characters, stories with impact. this is cnn presents with your host brooke baldwin and dr. sanjay gupta. good evening. we begin with a rare look inside anonymous. this shadowy and motley group of hackers and activist who is answer to no one, drawn together by love of internet mischief. now they re evolving into this movement of social change, a real driving force behind the wall street occupieroccupiers. they re hated by skurntd hunted by the fbi. who are these people and why are they taking to the streets? to get some answers,