NASA "tweetup" winners to witness shuttle history

When the shuttle Atlantis takes flight later this morning, two self-proclaimed "space geeks" will have a front-row seat to history.

Sara Blask and Todd Seip are two of the winners of NASA's "Tweet-up" contest and they're getting a chance to watch the final shuttle launch at the Kennedy Space Center.

They spoke with CNN's Ali Velshi about what it's like to win the chance to see the last shuttle launch.