On May 18, 2011 at 10:14 UTC the "Endeavour” American Space Shuttle docked to the International Space Station. As usual with shuttle-station linkups, it took most of an orbit to lock the two spacecraft together and complete leak checks before hatches were opened.
The STS-134 crew of Mark Kelly, Gregory Johnson, Andrew Feustel, Edward Michael Fincke, Gregory Chamitoff and Roberto Vittori, was welcomed aboard by Expedition 27 commander Dmitry Kondratyev and his five crewmates, Andrey Borisenko, Aleksandr Samokutyaev, Ronald Garan, Catherine Coleman and Paolo Nespoli.