The Endeavour astronauts wrapped up last-minute experiment transfers early Sunday, bid farewell to the crew of the International Space Station and moved back aboard the shuttle to prepare the ship for undocking Sunday night.
Commander Mark Kelly thanked the three-man station crew for its hospitality, saying "we had a very successful mission."
"We got the Alpha Magnetic Spectrometer installed, which is really a remarkable thing for physics and for science," he said. "That sensor's already collecting massive amounts of data and we're looking forward to hearing what those discoveries are."
Kelly, pilot Gregory H. Johnson, Michael Fincke, Gregory Chamitoff, Andrew Feustel and European Space Agency astronaut Roberto Vittori also delivered a pallet of spare parts, staged four spacewalks and helped service one of the station's oxygen generators and a carbon dioxide removal assembly.