1968 Democratic convention floor; Hubert Humphrey; Mayor Daley; Abbie Hoffman and yippies prepare for protest; National guardsmen; protests; riot barriers; Police club protestors with night sticks; people arrested; injured protestors with blood on them; inside convention, Humphrey accepts nomination, gives speech, says "never again shall we see what we have seen".<p>Humphrey and Ed Muskie at convention in Chicago, their wives next to them.<p>More COLOR footage of the protests and convention. <p> ABC News executives at Congressional Committee meeting after broadcasting violent DNC images.