>> came toward us, beating us with night sticks. >> john lewis is talking about bloody sunday, march 7, 1965 when 600 protesters tried to march from selma to montgomery, alabama to demand their voting rights. it's a key scene in the movie "selma." john lewis was the man in the white trench coat. but it's not a movie for lewis. it's a memory that still burns half a century later. >> i'm trying to protect my head. i really thought i was going to die there. >> when did you realize that bloody sunday was a tu point? >> the american people saw what happened. they couldn't take it. that was a sense of righteous indignation in america. >> reporter: on march 15 president lyndon johnson addressed a joint session of