People fill Broad Street while waiting for an anniversary event at the Edmund Pettus Bridge March 7, 2015 in Selma, Alabama. US President Barack Obama and the first family will visit Selma to commemorate the 50th anniversary of Bloody Sunday, when civil rights marchers attempting to walk to the Alabama capital of Montgomery to end voting discrimination against African Americans clashed with police. AFP PHOTO/BRENDAN SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
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