KENNEDY SPACE CENTER, Fla. -- STS-89 Commander Terrence Wilcutt participates in a question and answer session for the media during Terminal Countdown Demonstration Test (TCDT) activities at KSC. The seven astronauts assigned to the eighth Shuttle-Mir docking flight are at KSC for this dress rehearsal for launch, which 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. STS-89 Mission Specialist Andrew Thomas, Ph.D, will transfer to the Russian Space Station Mir, and succeed David Wolf, M.D., who will return to Earth aboard Endeavour. Dr. Thomas will live and work on Mir until June