Photos: 50 years later, a weekend of tributes to 'Bloody Sunday'
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President Barack Obama speaks near the Edmund Pettus Bridge, Saturday, March 7, 2015, in Selma, Ala. This weekend marks the 50th anniversary of "Bloody Sunday,' a civil rights march in which protestors were beaten, trampled and tear-gassed by police at the Edmund Pettus Bridge, in Selma. (AP Photo/Bill Frakes)