** FILE ** In this Oct. 15, 1957, file photo, seven of nine black students walk onto the campus of Central High School in Little Rock, Ark., with a National Guard officer as an escort. A judge Friday, Feb. 23, 2007, in one of the nation's longest-running school desegregation cases, released the Little Rock district from federal supervision nearly 50 years after President Eisenhower sent in troops to escort nine black students into the all-white school. (AP Photo, File)