KENNEDY SPACE CENTER, FLA. -- In the Orbiter Processing Facility, members of the STS-111 and Expedition 5 crews look over the payload. installed in Endeavour's payload bay. From left are Mission Specialists Philippe Perrin (kneeling) and Franklin Chang-Diaz, and Expedition 5 Commander Valeri Korzun, Sergei Treschev and Peggy Whitson. Perrin with the French Space Agency; Korzun and Treschev are with the Russian Space Agency. The crews are at KSC for Terminal Countdown Demonstration Test activities, which include payload familiarization and a simulated launch countdown. The mission crew also includes Commander Kenneth Cockrell and Pilot Paul Lockhart. The payload on the mission to the International Space Station includes the Mobile Base System, an Orbital Replacement Unit and Multi-Purpose Logistics Module Leonardo. 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.