Members of the crew look over part of the mission payload in Space Shuttle Endeavour's payload bay.

From the Payload Changeout Room, members of the STS-100 crew look over part of the mission payload, the SSRMS, in Space Shuttle Endeavour’s payload bay. The SSRMS, or Canadian robotic arm, is capable of handling large payloads and assisting with docking the Space Shuttle. It is crucial to the continued assembly of the International Space Station. The crew is at KSC to complete Terminal Countdown Demonstration Test activities that were postponed earlier. The TCDT includes emergency escape training, payload bay walkdown, and a simulated launch countdown. The primary payload also includes Multi-Purpose Logistics Module, Raffaello. Launch of Space Shuttle Endeavour on mission STS-100 is targeted for April 19 at 2:41 p.m. EDT from Launch Pad 39A