Columbia space shuttle tragedy

Four astronauts from the crew of the Space Shuttle Columbia mission STS-107; (clockwise from the bottom) Mission Specialist David M. Brown, Payload Commander Michael P. Anderson, Mission Specialist Kalpana Chawla and Payload Specialist Ilan Ramon pose for a photo in the SPACEHAB Research Module on January 27, 2003. (Photo by NASA/Getty Images)

Four astronauts from the crew of the Space Shuttle Columbia mission STS-107; (clockwise from the bottom) Mission Specialist David M. Brown, Payload Commander Michael P. Anderson, Mission Specialist Kalpana Chawla and Payload Specialist Ilan Ramon pose for a photo in the SPACEHAB Research Module on January 27, 2003. (Photo by NASA/Getty Images)