NASA employees, former astronauts, politicians and members of the general public attended a memorial service Thursday at the Washington National Cathedral in honor of the seven crew members of the Columbia space shuttle.

In order of appearance:
Dan Harris, NASA contractor from Tysons Corner, Va.

Sean O'Keefe, NASA Administrator

Rep. Chris Van Hollen (D-Md.)

Col. (Ret.) Robert Cabana, NASA Astronaut

Karen Hackney, space researcher from Bowling Green, Ky.

Beth Bahdorf of Chevy Chase, Md.

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