Stock Photo - STS-131 and Expedition 2223 crew members participate in a joint training session in the Space Vehicle Mock-up Facility at NASA's Johnson Space Center. Pictured on the left (front to back) are Russian cosmonaut Oleg Kotov, Expedition 22 flight engineer and Expedition 23 commander; NASA astronaut T.J. Creamer, Expedition 2223 flight engineer; and Japan Aerospace Exploration Agency (JAXA) astronaut Naoko Yamazaki, STS-131 mission specialist. Pictured on the right (front to back) are NASA astronaut Alan Poindexter, STS-131 commander; Japan Aerospace Exploration Agency (JAXA) astronauts Soichi Noguchi, Expedition 2223 flight engineer; and NASA astronaut Stephanie Wilson, STS-131 mission specialist.