(04/29/1997) --- STS-84 crew members practice emergency egress procedures in slidewire baskets at Launch Pad 39A. They are participating in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. In the foreground are Commander Charles J. Precourt, at left, and Pilot Eileen Marie Collins. In the middle basket are Mission Specialists Carlos I. Noriega, at left, and Jean-Francois Clervoy of the European Space Agency. In the last slidewire basket at rear, from left, are Mission Specialists C. Michael Foale, Edward Tsang Lu and Elena V. Kondakova of the Russian Space Agency. STS-84 aboard Atlantis will be the sixth docking of the Space Shuttle with the Russian Space Station Mir. After docking, Foale will transfer to the space station and become a member of the Mir 23 crew, replacing U.S. astronaut Jerry M. Linenger, who will return to Earth aboard Atlantis. Foale will live and work on Mir until mid-September when his replacement is expected to arrive on the STS-86 mission. STS-84 is targeted for a May 15 liftoff