As thousands marked 50 years since King's "I have a dream" speech, President Barack Obama called economic injustice the "great unfinished business" of the civil rights movement.
"The men and women who gathered 50 years ago were not there in search of some abstract ideal. They were there seeking jobs as well as justice…For what does it profit a man, Dr. King would ask, to sit at an integrated lunch counter if you can't afford the meal?'"
They gathered in the rain to mark the pivotal moment in the nation's history and were joined by dignitaries and civil rights leaders to commemorate a speech that came to symbolize America's struggle for equality.
That theme was echoed in the crowd, some of whom were at the original march in 1963.
The event capped a week-long celebration of King's call for racial and economic justice.