50th anniversary of the March on Washington (49 images)

Former President Bill Clinton delivers remarks during the 50th Anniversary of the March on Washington at the Lincoln Memorial in Washington, D.C. on August 28, 2013. Thousands gathered at the Memorial to celebrate the anniversary of Martin Luther King Jr.'s "I Have a Dream" speech. UPI/Kevin Dietsch

President Barak Obama greets Yolanda King, the daughter of Martin Luther King III and his wife Arndrea Waters during the 50th Anniversary of the March on Washington at the Lincoln Memorial in Washington, D.C. on August 28, 2013. Thousands gathered at the Memorial to celebrate the anniversary of Martin Luther King Jr.'s "I Have a Dream" speech. UPI/Kevin Dietsch

Actor Forrest Whitaker delivers remarks during the 50th Anniversary of the March on Washington at the Lincoln Memorial in Washington, D.C. on August 28, 2013. Thousands gathered at the Memorial to celebrate the anniversary of Martin Luther King Jr.'s "I Have a Dream" speech. UPI/Kevin Dietsch

US actress and entertainer Oprah Winfrey (L) delivers remarks during the 'Let Freedom Ring' commemoration event, at the Lincoln Memorial in Washington, DC on August 28, 2013. The event was held to commemorate the 50th anniversary of the August 28, 1963 March on Washington led by the late Dr. Martin Luther King Jr., where he famously gave his 'I Have a Dream' speech. UPI/Michael Reynolds