The crew leads the way out of the Operations and Checkout Building on their way to Launch Pad 39B for a simulated launch countdown.

The STS-108 crew leads the way out of the Operations and Checkout Building on their way to Launch Pad 39B for a simulated launch countdown. They are followed by the Expedition 4 crew. From front to back, left and right, are Pilot Mark E. Kelly and Commander Dominic L. Gorie; Mission Specialists Daniel M. Tani and Linda A. Godwin; Expedition 4 Commander Yuri Onufrienko; astronauts Daniel W. Bursch and Carl E. Walz. 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