Martin Luther King
Free at last! Free at last! Thank God almighty, we are free at last! This photograph by Bob Adelman was taken at the climax of Martin Luther King jnr's "I have a dream" speech in Washington in 1963. The Magnum Photos archive was acquired in February 2010 by MSD Capital, a private investment firm run by Michael Dell, chairman and chief executive of Dell.
The collection documents world events, and includes photographs of Marilyn Monroe, Martin Luther King jnr, Che Guevara, James Dean and Jacqueline Kennedy.