(05/17/2002) - The Expedition 5 crew - Commander Valeri Korzun (left), Sergei Treschev (center) and Peggy Whitson (right) - are in the slidewire basket and ready to exit the Fixed Service Structure on Launch Pad 39A. They and the STS-111 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