Scott Kelly practices driving an M-113 armored personnel carrier with fellow crew members aboard.

STS-118 Commander Scott Kelly practices driving an M-113 armored personnel carrier, as part of emergency exit training, with fellow crew members aboard. Behind Kelly is Mission Specialist Barbara R. Morgan. The crew is at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton