tonight, chilling new video and pictures of a navy yard gunman. the fbi is releasing these disturbing images of aaron a alex alexis. he's seen stalking people and ducking behind walls during his deadly rampage. alexis murdered 12 people before he was shot to death. today the fbi says he was under the delusional belief that he was being controlled by electromagnetic waves. you know where i stand on guns. let's hear what bill clinton will have to say. what will it take to change america's view on gun violence? >> i'll tell you exactly what it is. i'm the only president in modern times to ever consistently take on the nra and survive. but i lost 12 or 15 house