Photo: President Bush Greets Space Shuttle Discovery Astronauts

President George W. Bush greets the Space Shuttle Discovery astronauts outside Air Force One, Thursday, Nov. 8, 2007, on the tarmac at Ellington Field in Houston, Texas.

President Bush congratulated Space Shuttle Commander Pamela Melroy, left, and fellow astronauts, from left, Pilot George Zamka and mission specialists Scott Parazynski, Stephanie Wilson, Douglas Wheelock, Paolo Nespoli and Clayton Anderson, not seen in photo, on their successful 15-day mission to the International Space Station.

White House photo by Eric Draper