Families of the astronauts lost in the space shuttle Challenger accident are marking that tragic day 40 years ago.

The 40th anniversary of the Challenger disaster cast a shadow over NASA's annual Day of Remembrance event inside the Space ...

Read full article: INTERACTIVE: The NASA astronauts and employees who died in service to U.S. space exploration January 28th is a Day of Remembrance honoring the lives of the crew and teacher aboard ...

it is with deep, heartfelt sorrow. I address you here this afternoon at 11:40 a.m. This morning Space program experienced a national tragedy with the explosion of the space shuttle Challenger.

For millions of Americans, it was an event that would be seared into their memories for the rest of their lives – on par with the Kennedy assassination and 9/11. On that chilly January day in 1986, ...

Tuesday marks the 39th anniversary of the Space Shuttle Challenger tragedy.The shuttle exploded 73 seconds after takeoff on Jan. 28, 1986.New Hampshire teacher Christa McAuliffe was one of the seven ...

The Challenger disaster, a tragic day in space exploration history, took place on January 28, 1986. Just 73 seconds after launch, the Space Shuttle Challenger exploded, leading to the loss of seven ...

Corrections & Clarifications: An earlier version of this story misstated the date of the Space Shuttle Columbia disaster. It occurred Feb. 1, 2003. For millions of Americans, it was an event that ...