(05/17/2002) - STS-111 Commander Kenneth Cockrell has suited up in preparation for a simulated launch countdown at the pad. The simulation is part of STS-111 Terminal Countdown Demonstration Test activities for the crew and Expedition 5. 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