The space shuttle Discovery is seen as it lands at the Kennedy Space Center in Cape Canaveral, Florida, Tuesday, April 20, 2010. Discovery and the STS-131 mission crew--Commander Alan G. Poindexter, pilot James P. Dutton Jr. and mission specialists Dorothy Metcalf-Lindenburger, Rick Mastracchio, Stephanie Wilson, Clayton Anderson and Japanese astronaut Naoko Yamazaki--returned from their mission to the International Space Station. Image Credit: NASA/Bill Ingalls