VANDENBERG AIR FORCE BASE, Calif. — A SpaceX rocket carrying 64 small satellites lifted off from California on Monday, marking the first time the same Falcon 9 rocket has been used in three space missions. The rocket blasted off from Vandenberg Air Force Base, arcing over the Pacific Ocean west of Los Angeles as it headed toward space. Minutes later, the rocket’s first stage performed a so-called boost back maneuver and landed on an unmanned ship in the Pacific.