WIKIARCHIVES.SPACE

STS-90 Mission Specialist Dafydd (Dave) Williams, M.D., with the Canadian Space Agency, Pilot Scott Altman, and Payload Specialist Jay Buckey, M.D., train in an emergency egress system slidewire basket at Launch Pad 39B during Terminal Countdown Demonstration Test (TCDT) activities. The TCDT is held at KSC prior to each Space Shuttle flight to provide crews with the opportunity to participate in simulated countdown activities. Columbia is targeted for launch of STS-90 on April 16 at 2:19 p.m. EST and will be the second mission of 1998. The mission is scheduled to last nearly 17 days.