In this March 21, 1965 file photo, Martin Luther King Jr. and his civil rights marchers cross the Edmund Pettus Bridge in Selma, Ala., heading for capitol, Montgomery, during a five day, 50 mile walk to protest voting laws. The Edmund Pettus Bridge gained instant immortality as a civil rights landmark when white police beat demonstrators marching for black voting rights more than 50 years ago in Selma, Alabama.