Columbia, Challenger, Discovery, Atlantis, and Endeavour. An earlier shuttle, Enterprise, was used for early testing and then disassembled. Icons of space flight they undoubtedly are, but the ...

It has been 40 years since NASA launched the first dedicated Department of Defense Space Shuttle mission, after which engineers spotted O-ring seal defficiencies that would doom Challenger a year ...

Seventeen astronauts were lost in the Apollo 1 fire and the Challenger and Columbia space shuttle disasters. The crew of Apollo 1 during training in Florida in January 1967. From left, Virgil "Gus ...