Forty years after the Challenger disaster, NPR explores the engineers' last-minute efforts to stop the launch, their decades ...

NASA's Space Shuttle Program, which ran from 1981 to 2011, was a complex and ambitious project that pushed the boundaries of ...

Paul Weitz, a retired NASA astronaut who commanded the first flight of the space shuttle Challenger and also piloted the Skylab in the early 1970s, has died. He was 85. Weitz died at his retirement ...

It's been 40 years since the Challenger space shuttle, carrying seven people, took off from Florida's Kennedy Space Center, ...