WIKIARCHIVES.SPACE

The STS-81 flight crew goes over preflight checklists on the flight deck of the Space Shuttle orbiter Atlantis during the final phase of the Terminal Countdown Demonstration Test (TCDT) exercises for that mission, a simulated final countdown until just before main engine ignition. The crew are in their flight positions with the orbiter in a vertical attitude at Launch Pad 39B. Seated on the left foreground left Mission Specialist John M. Grunsfeld, while Michael A. Baker is in the left from Mission Commander's seat, while Pilot Brent W. Jett, Jr. is to his right.