US President Barack Obama 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, on March 7, 2015.

US President Barack Obama 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, on March 7, 2015. Obama declared Saturday on the 50th anniversary of a savagely repressed civil rights march in Selma, Alabama, that it was a global inspiration for those fighting for freedom. “From the streets of Tunis to the Maidan in Ukraine, this generation of young people can draw strength from this place, where the powerless could change the world’s greatest superpower, and push their leaders to expand the boundaries of freedom,” he said. AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP via Getty Images)