NBCNews.comJapan's robotic cargoshippushes off from space stationNBCNews.comAstronauts on the International Space Station bade farewell to a Japanese cargoshipWednesday, ending Japan's latest delivery flight to the orbiting lab. Japan's unmanned H-2 Transfer Vehicle 3 (HTV-3) left the space station at 11:50 a.m. EDT after...and more »