Mission Specialists Scott E. Parazynski left and Umberto Guidoni help Yuri V. Lonchakov exit Endeavour.

In the White Room, Mission Specialists Scott E. Parazynski (left) and Umberto Guidoni (right) help Yuri V. Lonchakov exit Endeavour. They and the rest of the crew are taking part in Terminal Countdown Demonstration Test activities that include emergency escape training at the pad and the simulated launch countdown. The mission is carrying the Multi-Purpose Logistics Module Raffaello and the SSRMS, to the International Space Station. Raffaello carries six system racks and two storage racks for the U.S. Lab. The SSRMS is crucial to the continued assembly of the orbiting complex. Launch of mission STS-100 is scheduled for April 19 at 2:41 p.m. EDT from Launch Pad 39A