In 1986, the Space Shuttle Challenger exploded 73 seconds after take-off, on its tenth mission to space. The root of the Challenger disaster lay in an engineering flaw in its solid rocket boosters.

Space Shuttle Columbia lifted off at 10:39 a.m. Eastern time on Jan. 16, 2003, from Kennedy Space Center’s Launch Pad 39-A with a crew of seven.

CAPE CANAVERAL, Fla. (AP) — NASA marked the 20th anniversary of the space shuttle Columbia tragedy with somber ceremonies and remembrances during its annual tribute to fallen astronauts on Thursday.

On July 26, 2005, the space shuttle Discovery launched on the first "Return to Flight" mission following the Columbia ...

On February 1, 2003, tragedy struck the space shuttle Columbia, as earlier damage to the craft's left wing caused the shuttle to be destroyed upon reentry, killing all seven astronauts on board. It ...

The launch takes place on a milestone date, marking 20 years since the STS-114 space shuttle mission took off from Kennedy ...

The Space Shuttle Challenger lifts off from the Kennedy Space Center in Cape Canaveral, Fla., on Jan. 28, 1986. A short time later, the Challenger exploded, killing the crew of seven onboard.

July 7, 2005 — -- When LeRoy Cain realized the space shuttle Columbia and its crew would not be coming home, a single tear slipped down his cheek as he paused, straightened his shoulders and ...

WATCH: Divers for a History Channel documentary made an unexpected discovery off Florida's east coast, stumbling upon wreckage from the 1986 explosion of the Challenger space shuttle. As Neetu ...

The Columbia approaching Launch Pad 39A. Courtesy of NASA Originally, Columbia was scheduled to launch two days earlier, on April 10. A technical problem delayed takeoff until the 12th. As a result, ...