KENNEDY SPACE CENTER, FLA. -- Workers gather to watch the rollover of Endeavour to the Vehicle Assembly Building. Here the orbiter is backing out of the Orbiter Processing Facility bay 2. In the VAB Endeavour will be stacked with its solid rocket boosters and external tank atop the Mobile Launcher Platform. Endeavour is scheduled to launch April 19 on mission STS-100, the ninth flight to the International Space Station - NASA Kennedy Center Media Archive Collection