Text transcribed from caption: PC-32321 SELMA MARCH UNDERWAY AT LONG LAST SELMA, Ala. -- This aerial view shows a half-mile long column of civil rights demonstrators -- including many clergy -- on the first leg of a 50-mile march to Montgomery, the state capital, in support of the Negro voter registration drive. The marchers -- an estimate 3,500 left Selma -- are shown crossing the Pettus Bridge, where the first scheduled freedom march was broken up by state troopers on Sunday, March 7. This time, the march was authorized by a federal court and was protected by Army and federalized Alabama National Guard troops. Leading the walk was Dr. Martin Luther King, Jr., head of the Southern Christian Leadership Conference, which has been spearheading the long registration effort. At the end of the five-day march along U.S. Highway 80, Negro leaders hoped to present a civil rights petition to Gov. George C. Wallace, who earlier declined to protect the demonstrators. Credit Must Read: RELIGIOUS NEWS SERVICE PHOTO (U-3D-65-NAB)