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http://twitter.com/#!/NASA/status/89341036589101059 http://twitter.com/#!/NASA/status/89341036589101059 "The countdown has entered a 45-minute hold at T-9 minu

http://twitter.com/#!/NASA/status/89341036589101059 http://twitter.com/#!/NASA/status/89341036589101059 "The countdown has entered a 45-minute hold at T-9 minutes."