(04/18/2001) -- Lights on Launch Pad 39A cast a warm glow over Space Shuttle Endeavour after rollback of the Rotating Service Structure. On the left, stretching past the solid rocket booster to the orbiter, is the Orbiter Access Arm with the White Room at the end. The White Room provides a controlled environment for entry into the orbiter. Endeavour is expected to lift off on mission STS-100 on April 19, carrying the Multi-Purpose Logistics Module Raffaello and the Canadian robotic arm, SSRMS, with a crew of seven to the International Space Station