SELMA, AL - MARCH 07: President Barack Obama, first lady Michelle Obama, Malia Obama, Sasha Obama, with members of Congress and civil rights leaders make a symbolic walk across the Edmund Pettus Bridge March 7, 2015, in Selma, Alabama. 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. (Photo by Gerald Herbert-pool/Getty Images)
