Ron Garan and Mike Fossum prepare for the mission's third scheduled session of extravehicular activity EVA.

Astronauts Ron Garan (left) and Mike Fossum (right), both STS-124 mission specialists, prepare for the mission's third scheduled session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station while Space Shuttle Discovery is docked with the station. Astronauts Mark Kelly (background center), commander, and Greg Chamitoff, Expedition 17 flight engineer, assisted Garan and Fossum.