November 16, 2009 7:54 am NASA's Tweetup You can be a NASA groupie using Twitter today as a group of users participate in the NASA Tweetup tied to the launch of Atlantis. US & World Videos 5:49 Kelly Clarkson hilariously attempts handmade pasta with chef Evan Funke 1:36 O.J. Simpson's cause of death revealed 2:03 Does Shakira still believe in love following Gerard Piqué split? 2:36 Super dad makes Mario-themed obstacle course for son's birthday 1:59 Ellen DeGeneres jokes about being ‘kicked out of show business'