Stock Photo - At the Kremlin Wall in Moscow, NASA astronaut Shannon Walker, Expedition 24 flight engineer, pays homage to Russian space icons during a traditional laying of flowers in Red Square May 31, 2010. Walker, along with Russian cosmonaut Fyodor Yurchikhin, Soyuz commander; and NASA astronaut Doug Wheelock, flight engineer, are scheduled to launch June 15 in the Soyuz TMA-19 spacecraft from the Baikonur Cosmodrome in Kazakhstan bound for the International Space Station. In the background on hand to participate in the traditional ceremony were the backup crew members (from right to left), Russian cosmonaut Dmitry Kondratyev, NASA astronaut Cady Coleman and Paolo Nespoli of the European Space Agency, along with NASA official Mark Thiessen.Stephanie Stoll