Stephen Colbert, host of The Colbert Report, salutes the crew of STS-135 during their appearance for a taping of his television show, Tuesday evening, Aug. 16, 2011, in New York. The astronauts from STS-135 are in New York for a three-day visit. Seated from lower left are Commander Chris Ferguson, pilot Doug Hurley, and mission specialists Sandy Magnus and Rex Walheim. Image Credit: NASA/Paul E. Alers