going on the medical problems and the legal problems. football has several issues. culture of accepted risk. world of nonguaranteed contracts. you have to get back out there or somebody else will take your job. but key to the legal situation here is did the nfl give these guys the wrong information? and i think there is some evidence that they may have done that. there's a 2007 nfl pamphlet they gave the players saying research has not shown that having one or two concussions leads to permanent problems. roger goodall read it to players and focused on active players other than retired players showing much more cte. >> right. >> do you think there's a base taos the lawsuit where the nfl will be in trouble for giving the players the wrong information? >> there's a real threat here. it's a question of whether the nfl actively covered up what they knew. if they did something akin to the building materials industry