Support WBURSpace Shuttle Discovery Lifts Off On Final MissionBill ChappellFebruary 24, 2011 ShareCommander Steve Lindsey, right, waves as he and the crew of space shuttle Discovery prepare to board the shuttle at pad 39A Thursday. (AP)
Commander Steve Lindsey, right, waves as he and the crew of space shuttle Discovery prepare to board the shuttle at pad 39A Thursday. (AP)