SELMA, Ala. -- Crowds gather on March 7, 2015, before a speech by President Barack Obama marking the 50th anniversary "Bloody Sunday," a civil rights march in which protesters were beaten, trampled and tear-gassed by police at the Edmund Pettus Bridge, in Selma, Ala.
PHOTOS: Crowds gather for 'Bloody Sunday' anniversary in Selma
Demonstrators march over the Brooklyn Bridge to mark the 50th anniversary of the landmark event of the civil rights movement in Selma, Ala., on March 7, 2015, in New York. (AP Photo/John Minchillo)
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