CAPE CANAVERAL, Fla. (AP) — A space shuttle left the International Space Station for the very last time Tuesday, heading home to end the 30-year run of a vessel that kept U.S. astronauts flying to and from orbit longer than any other rocketship. Atlantis slipped away after performing a partial lap around the space station. Ten pairs of eyes pressed against the windows, four in the shuttle and six in the station.