Wheelock in the A/L prior to Expedition 16 / STS-120 EVA 4

ISS016-E-009293 (3 Nov. 2007) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, astronaut Doug Wheelock, STS-120 mission specialist, is pictured as he is about the leave the International Space Station through the Quest Airlock to begin the mission's fourth session of extravehicular activity (EVA) while Space Shuttle Discovery is docked with the station.