doug brickly beyond this tragedy why was this such an important anniversary for america? >> well, i think a lot of people are remembering where they were, what i did that day. this was but to us live on television. playing clips of walter cronkite not just john f. kennedy, who is lee harvey oswald, why is jackie wearing a suit with blood. on and on for four days. everybody kind of tuned in. there's a line by bob dylan said people don't live or die people just net. most people live in the-lined lives when kennedy was killed, they weren't floating any more it was like realtime adrenaline for the whole country. >> schieffer: you know, those of us who were here and covered this story, i think a part that is not really understood today is that beyond this tragedy that we saw unfolding on television, we'd never seen anything like this before. hanging overall this it was like we all felt on 9/11 we didn't know what it meant. we didn't know if this was the beginning of world war iii, a year away from the human missile crisis. it was just this profound, i can't understand this. wh