NASA pledges 'acute awareness' of astronaut safety 20 years after Columbia shuttle tragedy

Seven astronauts lost their lives on space shuttle Columbia on Feb. 1, 2003, due to a series of technical and organizational problems at NASA.

NASA pledges 'acute awareness' of astronaut safety 20 years after Columbia shuttle tragedy
Seven astronauts lost their lives on space shuttle Columbia on Feb. 1, 2003, due to a series of technical and organizational problems at NASA.