On January 20, 2003--Martin Luther King Day--the Democratic presidential candidate gave a speech in Richmond, Virginia. "I remember well April, 1968," he told his audience. "I was serving in Vietnam--a place of violence--when the news reports brought home to me and my crewmates the violence back home - and the tragic news that one of the bullets flying that terrible spring took the life" of Martin Luther King.
Okay, but the senator didnt go to Vietnam until November 1968. But, hey, it gave him a chance to work his war record into one more speech. (Thanks to Division of Labour for the link.)