STS 116 crew members get information about the external air lock they are looking at.

During a Crew Equipment Interface Test (CEIT) in the Orbiter Processing Facility, STS-116 crew members get information about the external air lock they are looking at. At left is Mission Specialist Christer Fugelsang and at right is Mission Specialist Robert Curbeam. Fugelsang represents the European Space Agency. A CEIT allows astronauts to become familiar with equipment and hardware they will use on the mission. STS-116 will be mission No. 20 to the International Space Station and construction flight 12A.1. The mission payload is the SPACEHAB module, the P5 integrated truss structure and other key components. Launch is scheduled for no earlier than Dec. 7. Photo credit: NASA/Kim Shiflett