At Launch Pad 39-A, the STS-111 and Expedition Five crews take time out from a tour of the pad with their friends and family to pose for a group portrait. From left, they are STS-111 Pilot Paul Lockhart, STS-111 Commander Kenneth Cockrell, Expedition Five Commander Valeri Korzun (RSA), Expedition Five astronaut Peggy Whitson, Expedition Five cosmonaut Sergei Treschev (RSA), and STS-111 Mission Specialists Philippe Perrin (CNES) and Franklin Chang-Diaz. Expedition Five is traveling to the International Space Station on Space Shuttle Endeavour as the replacement crew for Expedition Four, who will return to Earth aboard the orbiter. Known as Utilization Flight 2, STS-111 is carrying supplies and equipment to the Station. The payload includes the Multi-Purpose Logistics Module Leonardo, 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