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KENNEDY SPACE CENTER, Fla. -- Participating in Terminal Countdown Demonstration Test (TCDT) activities at Kennedy Space Center are, from left to right, STS-89 Mission Specialists Andrew Thomas, Ph.D., who will transfer to the Russian Space Station Mir, Salizhan Sharipov of the Russian Space Agency, and James Reilly, Ph.D. Dr. Thomas will succeed David Wolf, M.D., who will return to Earth aboard Endeavour. The seven astronauts assigned to the eighth Shuttle-Mir docking flight are completing TCDT activities at KSC. A dress rehearsal for launch, the TCDT includes emergency egress training at the launch pad and culminates with a simulated countdown. The Space Shuttle Endeavour is undergoing preparations for liftoff, scheduled for Jan. 22. Dr. Thomas will live and work on Mir until June