Sunita Williams and Joan Higginbotham listen to instructions on use of the carrier that could be used to move in the event of an emergency.

STS-116 Mission Specialists Sunita Williams (left) and Joan Higginbotham listen to instructions on use of the M-113 armored personnel carrier that could be used to move them quickly away from the launch pad in the event of an emergency. The mission crew is at KSC for terminal countdown demonstration test (TCDT) activities that are preparation for launch. Other crew members are Commander Mark Polansky, Pilot William Oefelein and Mission Specialists Robert Curbeam, Nicholas Patrick and Christer Fuglesang, who represents the European Space Agency. The STS-116 mission is 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