WASHINGTON — NASA observed its annual Day of Remembrance on Jan. 23, honoring the members of the NASA family who lost their lives in the pursuit of exploration and discovery for benefit of humanity.

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

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

Astronaut Memorial Ceremony took place Sunday to honor the 17 NASA crew members lost in the Apollo 1, Challenger and Columbia ...

NASA's Challenger shuttle exploded 73 seconds ... of Apollo 1 and space shuttle Columbia, during its annual Day of Remembrance ceremony on Jan. 23. "Today, we honor the heroes of our program ...