ISS016-E-007838 (28 Oct. 2007) --- Attired in their Extravehicular Mobility Unit (EMU) spacesuits, astronauts Daniel Tani (left), Expedition 16 flight engineer, and Scott Parazynski, STS-120 mission specialist, prepare for the mission's second session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station while Space Shuttle Discovery is docked with the station. European Space Agency (ESA) astronaut Paolo Nespoli (center bottom), STS-120 mission specialist, assisted Tani and Parazynski, while astronaut Doug Wheelock, mission specialist, photographs the event.