The International Space Station has four new residents. SpaceX delivered a fresh crew to the orbiting outpost on Saturday. It was a quick trip for the U.S., Russian and Japanese astronauts, who pulled up 15 hours after their liftoff from Florida. The Russians hold the record for the fastest ferry flight to the space station, a lightning-fast three hours. The new arrivals will spend at least six months in orbit, swapping places with colleagues up there since March. SpaceX will bring those four back next week.