Columbia space shuttle tragedy

The crew of Space Shuttle Columbia's mission STS-107 pose for the traditional crew portrait. Seated in front are astronauts Rick D. Husband (L), mission commander; Kalpana Chawla, mission specialist; and William C. McCool, pilot. Standing are (L to R) astronauts David M. Brown, Laurel B. Clark, and Michael P. Anderson, all mission specialists; and Ilan Ramon, payload specialist representing the Israeli Space Agency. (Photo by NASA/Getty Images)

The crew of Space Shuttle Columbia's mission STS-107 pose for the traditional crew portrait. Seated in front are astronauts Rick D. Husband (L), mission commander; Kalpana Chawla, mission specialist; and William C. McCool, pilot. Standing are (L to R) astronauts David M. Brown, Laurel B. Clark, and Michael P. Anderson, all mission specialists; and Ilan Ramon, payload specialist representing the Israeli Space Agency. (Photo by NASA/Getty Images)