STS-107 Pilot William "Willie" McCool operates an M113 armored personnel carrier

STS-107 Pilot William "Willie" McCool operates an M113 armored personnel carrier during Terminal Countdown Demonstration Test activities, a standard part of launch preparations. Instructor George Hoggard (left) supervises the training. 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.