The Space Shuttle Challenger Accident Investigation

The tugboat and barge transporting the last space shuttle external tank to its display venue in California have reached the inlet to the Panama Canal, now just days away from sailing into the Pacific.

President Reagan addressed the nation with this speech 31 years ago today, following the loss of the space shuttle Challenger and crew on Jan. 28, 1986.

The crew of Space Shuttle mission STS 41-B provide an overview of their mission. Challenger launched from the Kennedy Space Center on February 3, 1984, and although the flight was marred by the failure of two commercial satellite deployments, astronaut Bruce McCandless made history by making the first untethered spacewalk using the Manned Maneuvering Unit jet pack.