Mission Specialist Michael L. Gernhardt and Janice Voss check out one of the baskets for the emergency egress slidewire system.

STS-83 Mission Specialist Michael L. Gernhardt and Payload Commander Janice Voss check out one of the baskets for the emergency egress slidewire system at Launch Pad 39A during Terminal Countdown Demonstration Test (TCDT) exercises for that mission. Mission Specialist Donald A. Thomas can be seen to the far left. Other crew members on the 16-day Microgravity Science Laboratory1 (MSL-1) mission are: Mission Commander James D. Halsell, Jr.; Pilot Susan L. Still; and Payload Specialists Gregory T. Linteris and Roger K. Crouch