child to hundreds of hits in the head before age 14. and at 14 we have to have a conversation. there's no safe age to start getting hit in the head as much as football players do. >> not just a football issue. military veterans, another segment of society we see suffering from cte. >> it's become a big priority for us. we just launched project enlist. go to projectenlist.org to donate their brains and seek help. we have diagnosed this in dozens of military veterans. 9 of the first 11 veterans serving in iraq and afghanistan and were exposed to blast. >> christopher, thank you for being here. martin luther king's family calling for no celebration of his holiday next month unless there's action on voting rights. that's how serious a threat to democracy they see. but that and filibuster reform are not the only things that may need fixing. that's tonight's reality check with john avlon next.