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 ...

The strong-willed director of NASA’s Marshall Space Flight Center ... known as an O-ring, on one of two booster rockets, which were attached to the shuttle like a jetpack to propel it skyward.

In 1986 he somewhat reluctantly agreed to join the Rogers Commission, whose task was to investigate the Challenger disaster. The space shuttle ... disaster was that O-rings on one of the sections ...

Lucas, a NASA rocket scientist who helped shape the nation's first satellite as well as its first space ... about the O-rings, he also suggested that disasters like the Challenger tragedy ...