(05/15/2002) -- During Terminal Countdown Demonstration Test activities at KSC, Expedition 5 crew member Sergei Treschev pauses before climbing inside the M-113 armored personnel carrier, used for emergency egress training at the pad. At left (behind Treschev) is George Hoggard, with the KSC/CCAS Fire Department, who supervises the driving. At right are Expedition 5 member Peggy Whitson and astronaut Tracy Caldwell (far right), a mission specialist candidate currently assigned to the Astronaut Office Space Station Operations Branch. The TCDT also includes a simulated launch countdown 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. . 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. Launch of Space Shuttle Endeavour on mission STS-111 is scheduled for May 30, 2002