(05/17/2002) - The Expedition 5 crew pauses during suitup before going to the pad for a simulated launch countdown, part of Terminal Countdown Demonstration Test activities. From left are cosmonaut Sergei Treschev, astronaut Peggy Whitson and Commander Valeri Korzun. . Expedition 5 will travel to the International Space Station on mission STS-111 as the replacement crew for Expedition 4, who will return to Earth aboard Endeavour. Mission STS-111 is known as Utilization Flight 2, carrying supplies and equipment in the Multi-Purpose Logistics Module Leonardo to the Station. The payload also includes the Mobile Base System, which will be installed on the Mobile Transporter to complete the Canadian Mobile Servicing System, or MSS, and a replacement wrist/roll joint for Canadarm 2. The mechanical arm will then have the capability to 'inchworm' from the U.S. Lab Destiny to the MSS and travel along the truss to work sites. Launch is scheduled for May 30, 2002