(05/17/2002) -- On Launch Pad 39A, STS-111 Mission Specialists Franklin Chang-Diaz and Philippe Perrin practice making a hasty exit from the 195-foot level to the slidewire baskets in the event of an emergency. Perrin is with the French Space Agency. They and the rest of the STS-111 crew and Expedition 5 crew are taking part in Terminal Countdown Demonstration Test activities, which include emergency egress training and a simulated launch countdown. Mission STS-111 is Utilization Flight 2, carrying equipment and supplies in the Multi-Purpose Logistics Module Leonardo to the International Space Station, plus the Mobile Base System (MBA) and an Orbital Replacement Unit. The MBS will be installed on the Mobile Transporter to complete the Canadian Mobile Servicing System, or MSS, enabling Canadarm 2 to 'inchworm' from the U.S. Lab Destiny to the MSS and travel along the truss to work sites. The Expedition 5 crew is traveling on Endeavour to replace the Expedition 4 crew on the Station. Launch of Endeavour is scheduled for May 30, 2002