JSC2011-E-067995 (21 July 2011) --- NASA astronaut Chris Ferguson, STS-135 commander, makes a public statement as, from left, NASA Administrator Charles Bolden, along with NASA astronauts Rex Walheim, Sandy Magnus and Doug Hurley look on after the space shuttle Atlantis landed on July 21 at the Kennedy Space Center in Florida. The landing completed STS-135, the final mission of the NASA Space Shuttle Program. Photo credit: NASA Photo/Houston Chronicle, Smiley N. Pool