NASA Associate Administrator for Space Operations William Gerstenmaier center responds to a question from the media.

At a post-landing news conference, NASA Associate Administrator for Space Operations William Gerstenmaier (center) responds to a question from the media. At right is Shuttle Launch Director Mike Leinbach; at left is Assistant Administrator for NASA Public Affairs David Mould. After a round trip of nearly 5.3 million miles, space shuttle Atlantis and crew returned to Earth with a landing at 9:07 a.m. EST. The shuttle landed on orbit 202 to complete the 13-day STS-122 mission. Main gear touchdown was 9:07:10 a.m. Nose gear touchdown was 9:07:20 a.m. Wheel stop was at 9:08:08 a.m. Mission elapsed time was 12 days, 18 hours, 21 minutes and 44 seconds. During the mission, Atlantis' crew installed the new Columbus laboratory, leaving a larger space station and one with increased science capabilities. The Columbus Research Module adds nearly 1,000 cubic feet of habitable volume and affords room for 10 experiment racks, each an independent science lab. Photo credit: NASA/Jim Grossmann