ISS Expedition 20 and 21 crewmembers

ESA astronaut Frank De Winne (second right), Expedition 20 flight engineer and Expedition 21 commander; along with Canadian Space Agency astronaut Robert Thirsk (left), cosmonaut Roman Romanenko and NASA astronaut Nicole Stott, all Expedition 20/21 flight engineers, pose for a portrait following an Expedition 20/21 preflight press conference at NASA's Johnson Space Center. De Winne, Romanenko and Thirsk are scheduled to launch to the International Space Station aboard a Russian Soyuz spacecraft in May 2009. Stott is scheduled to travel to the station aboard the Space Shuttle Discovery in August 2009.