STS-133 mission crew members, from left, Nicole Stott, Michael Barratt, pilot Eric Boe, Commander Steve Lindsey, Alvin Drew and Steve Bowen, pose for a photograph in front of the space shuttle Discovery after landing, Wednesday, March 9, 2011, at Kennedy Space Center in Cape Canaveral, Fla., completing Discovery’s 39th and final flight. Since 1984, Discovery flew 39 missions, spent 365 days in space, orbited Earth 5,830 times and traveled 148,221,675 miles. Image Credit: NASA/Bill Ingalls