Ann Marie Cunningham, center, along with other NASA Twitter followers wave to the Astro van as it passes by en route to launch pad 39A with the crew of STS-129, Monday, Nov. 16, 2009 at Kennedy Space Center in Cape Canaveral, Fla. The Twitter users were part of a unique two-day NASA Tweetup at Kennedy Space Center. Photo Credit: (NASA/Carla Cioffi)