Tweetup
The group of “tweeps” who participated in the NASA Goddard Sun Earth Day Tweetup on Sat. March 19 pose in front of the Smithsonian National Air and Space building on the National Mall.
The Museum partnered with NASA Goddard to host the morning portion of the “tweetup”—an informal meeting of people who use the social messaging medium Twitter.
Photo by Mark Avino
Posted: 22 March 2011
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