NASA's Annual Day of Remembrance today, Jan. 26, honors the astronauts who died during the Apollo 1 fire and the Challenger and Columbia space shuttle disasters.

NASA's fatal Challenger launch still echoes through the agency today

Divers Accidentally Discover Challenger Space Shuttle Debris From 1986 Explosion

NASA Confirms Discovery of Space Shuttle Challenger Artifact

Filmmakers Find Section of Destroyed Space Shuttle Challenger on Ocean Floor

Long-lost wreckage from the Challenger spacecraft discovered near Bermuda Triangle

Divers discover Challenger space shuttle debris

Decades After The Tragedy, a Fragment of Challenger Has Been Found

Divers Have Found a Piece of the Space Shuttle Challenger Off the Coast of Florida

Section of destroyed shuttle Challenger found on ocean floor

Section of destroyed shuttle Challenger found on ocean floor

History Channel team finds large piece of space shuttle Challenger on ocean floor

Piece of the space shuttle Challenger found by divers in the Atlantic Ocean off Florida

This Day in Space: April 29, 1985: The European ‘Spacelab’ launches on space shuttle Challenger

Space shuttle Challenger and the disaster that changed NASA forever

Challenger artifacts intended for President Reagan recovered after 36 years

New NASA video honors fallen astronauts of Apollo 1, Challenger and Columbia

“I was a child of the eighties, I vividly remember the Challenger explosion. Thats [why this] was always a little bit daunting” says Jason Herir, director of Last Dance and Countdown — the first limited series shot in space — and a potential blueprint for future documentaries shot entirely in orbit.

Looking Back at the Challenger Disaster

The Man Who Tried To Stop The Space Shuttle Challenger Launch And Exposed NASA's Cover-Up Dies At 83