Article Photos: Marching for King's dream: 'The task is not done' 3/19

Actress Gabrielle Union and Rep. John Lewis, D-Ga., are seated on stage at the unveiling of a U.S. Postal Service stamp commemorating the 50th anniversary of the March on Washington, Friday, Aug. 23, 2013, at the Newseum in Washington. (AP Photo/Charles Dharapak)