(11/09/2001) -- The Expedition 4 crew take their seats in Space Shuttle Endeavour prior to a simulated launch countdown. From left are astronaut Daniel W. Bursch, cosmonaut Yuri Onufrienko, commander, and astronaut Carl E. Walz. Expedition 4, which is the replacement resident crew for the International Space Station, is traveling to the Space Station as part of mission STS-108. The simulated countdown is part of Terminal Countdown Demonstration Test activities, which have also included emergency exit training from the orbiter. Launch of Space Shuttle Endeavour on mission STS-108 is scheduled for Nov. 29 at 7:44 p.m. EST