Crew members for space shuttle Discovery's mission pose for the traditional photo celebrating the launch.

Crew members for space shuttle Discovery's STS-124 mission pose for the traditional photo celebrating the upcoming launch. From left are Mission Specialists Gregory Chamitoff and Ron Garan, Pilot Ken Ham, Commander Mark Kelly, and Mission Specialists Karen Nyberg, Akihiko Hoshide and Mike Fossum. Chamitoff will join the Expedition 17 crew on the International Space Station as a flight engineer, taking the place of astronaut Garrett Reisman, who will return to Earth on Discovery. Hoshide represents the Japan Aerospace Exploration Agency. The STS-124 mission is the second of three flights launching components to complete the Japan Aerospace Exploration Agency's Kibo laboratory. The shuttle crew will install Kibo's large Japanese Pressurized Module and its remote manipulator system, or RMS. The 14-day flight includes three spacewalks. Launch is scheduled for 5:02 p.m. May 31. Photo credit: NASA/Kim Shiflett