The STS-107 crew exits the Operations and Checkout Building for a ride to Launch Pad 39A and a simulated launch countdown. From left are Payload Specialist Ilan Ramon, Mission Specialist Kalpana Chawla, Payload Commander Michael Anderson, Mission Specialist David Brown, Pilot William "Willie" McCool, Mission Specialist Laurel Clark and Commander Rick Husband. The countdown is part of Terminal Countdown Demonstration Test activities. STS-107 is a mission devoted to research and will include more than 80 experiments that will study Earth and space science, advanced technology development, and astronaut health and safety. Launch is planned for Jan. 16, 2003, between 10 a.m. and 2 p.m. EST aboard Space Shuttle Columbia.