About an hour from their planned deorbit burn, Space shuttle Discovery's astronauts have donned their launch and entry suits and are preparing for today's landing. Weather remains favorable, with scattered clouds in the vicinity of the shuttle landing facility. Discovery will perform the deorbit burn at 10:10 a.m. EDT and target an 11:15:18 a.m. landing on runway 15 at NASA's Kennedy Space Center, Fla.