followed up to question alexis, no one on the naval base, not his employer. so it really fell by the wayside, call the navy, call the fbi, they won't comment. >> deb, thanks so much for joining us. appreciate it. it is an unfortunate situation we find ourselves in time and time again. maybe trying to find answers from a tragedy like this. and joining me to try to make some sense out of this is forensic psychiatrist dr. wellner. i enjoy your insights. you alluded to this, people don't just snap certainly in a situation like this. looking back -- again, this is from some of the police reports, it appears there were warning signs with aaron alexis to the point where he even kept security clearance. you heard this, he got a gun. it seems like we see that again and again. the national psyche has been sort of really hit hard over this last year, but that's the story. signs were missed. someone got a gun. mass tragedy occurs. how does this happen? how do they fall through the