CAPE CANAVERAL, Fla. – Seated in Space Shuttle Discovery's cockpit on NASA Kennedy Space Center's Launch Pad 39A, STS-128 Mission Specialists (from left) Nicole Stott, Christer Fuglesang and Danny Olivas have completed the simulated launch countdown. They and other mission crewmembers are at KSC to take part in the terminal countdown demonstration test, or TCDT, which includes emergency exit training and culminates in the simulated countdown.