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The crew of the space shuttle Discovery successfully completed a dress rehearsal today for their upcoming launch. They capped off their practice run at Cape Canaveral with a simulated countdown to liftoff at 11:00 a.m. EDT.

The seven STS-124 astronauts are scheduled to launch May 31 at 5:02 p.m. EDT to deliver the International Space Station's largest room, the 32,500-pound Japanese Kibo Laboratory. Crewmembers are slated to perform three spacewalks during their planned 13-day mission.

Source http://www.space.com/missionlaunches/080509-sts124-launch-rehearsal.html