NASA recently paid tribute to the Challenger crew and other fallen astronauts during its annual Day of Remembrance.

Today marks the 39th anniversary of the Space Shuttle Challenger disaster (Mission STS-51-L), when the shuttle's seven astronauts were killed by an explosion.

As we reflect on the Challenger mission, 39 years later we want to know, what memories do you have of the shuttle, its crew, ...

Looking back at the weather 39 years ago and how it impacted the Challenger launch, leading to one of the most tragic losses ...

It's been 39 years since the Challenger space shuttle, carrying seven people, took off from Florida's Kennedy Space Center, ...

Today marks 39th anniversary of Space Shuttle Challenger explosion, which took lives of seven crew members, including Ronald ...

The world was shocked and saddened 39 years ago after the Space Shuttle Challenger tragedy. The crewed shuttle mission for ...

O-ring erosion on Discovery would have disastrous effects a year later It has been 40 years since NASA launched the first ...

For millions, it was an event that would be seared into their memories for the rest of their lives – on par with the Kennedy ...

Jan. 23, marks a day of remembrance for NASA and the Astronauts Memorial Foundation. The solemn ceremony pays tribute to the lives lost in three of the most tragic moments in NASA's history.

"We must honor their sacrifice by fortifying our commitment to safety and excellence as new generations of space explorers, follow their footsteps." ...

This recap was current as of early this morning (January 19). Sixty-two members of California Urban Search and Rescue (US&R) ...