CAPE CANAVERAL, FL: NASA invited 96 people to Kennedy Space Center for a tweet-up for the lift-off of Space Shuttle Atlantis November 15 and 16. This is the fifth time NASA has hosted a tweet-up event, but "it is by far the biggest, most involved one," said Stephanie Schierholz, public affairs specialist for NASA.

"NASA, because we're a government agency, has limited ways in which we can reach the public; we can't advertise, for example," she said. "We're always ...