"Crowds of people walk toward Selma after taking a symbolic walk across the Edmund Pettus Bridge, Sunday, March 8, 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/Gerald Herbert)"
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