KENNEDY SPACE CENTER, FLA. - In the Vehicle Assembly Building at NASA’s Kennedy Space Center, Space Shuttle Discovery is surrounded by work platforms as it awaits rollout to Launch Pad 39B for Return to Flight mission STS-114 to the International Space Station. It rests on the Mobile Launcher Platform, which will be moved to the pad by the double-tracked Crawler-Transporter. This launch will be Discovery’s 31st flight. The launch window is May 15 to June 3.