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STS-125 Tweetup (200907210002HQ) | by NASA HQ PHOTO
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STS-125 Tweetup (200907210002HQ)

Guest at NASA Headquarters in Washington, DC prepare for a Tweetup on July 21, 2009. Nearly 200 of NASA's Twitter followers are in attendance, which features a presentation and a question and answer session with the crew of the STS-125 shuttle mission to repair the Hubble Space Telescope. Photo Credit: (NASA/Carla Cioffi)

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Taken on July 21, 2009