(05/15/2002) -- Expedition 5 crew member Sergei Treschev, with the Russian Space Agency, wears the helmet with his launch and entry suit during suit check, part of Terminal Countdown Demonstration Test activities at KSC. The TCDT includes emergency egress training at the pad and a simulated launch countdown. Expedition 5 will travel to the International Space Station as the replacement crew for Expedition 4, who will return to Earth aboard Endeavour. Known as Utilization Flight -2, the mission includes attaching a Canadian-built mobile base system to the International Space Station that will enable the Canadarm2 robotic arm to move along a railway on the Station's truss to build and maintain the outpost. The crew will also replace a faulty wrist/roll joint on the Canadarm2 as well as unload almost three tons of experiments and supplies from the Italian-built Multi-Purpose Logistics Module Leonardo. Launch of Space Shuttle Endeavour on mission STS-111 is scheduled for May 30, 2002