Editor’s Note: The CNN Original Series “Space Shuttle Columbia: The Final Flight” uncovers the events that ultimately led to disaster. The four-part documentary concludes at 9 p.m. ET/PT Sunday. When ...

CAPE CANAVERAL, Fla. - On a sleepy winter Saturday morning in 2003, most Americans had no idea that seven astronauts were gliding back to Earth after more than two weeks in space. But the whole nation ...

David Klaus, a retired University of Colorado Boulder professor, was a 23-year-old launch control engineer at NASA when the Challenger spacecraft exploded shortly after liftoff in 1986. When his ...

(CNN) — When NASA’s Columbia shuttle launched on January 16, 2003, it carried a crew of seven astronauts who had spent nearly three years getting to know one another before venturing on a 16-day ...