Commemoration of 'Bloody Sunday' set in Alabama

President Obama hugs Rep. John Lewis
US President Barack Obama (R) hugs US Representative John Lewis, Democrat of Georgia, one of the original marchers at Selma, during an event marking the 50th Anniversary of the Selma to Montgomery civil rights marches at the Edmund Pettus Bridge in Selma, Alabama, March 7, 2015. A bipartisan group will commemorate the march on Sunday.
Saul Loeb | AFP | Getty Images