When NPR reported Bob Ebeling's story on the 30th anniversary of the explosion of the space shuttle Challenger, hundreds of listeners and readers expressed distress and sympathy in letters and emails.

Bob Ebeling, an anonymous source for NPR's 1986 report on the disaster, tells NPR that despite warning NASA of troubles before the launch, he... 30 Years After Explosion, Challenger Engineer Still ...

Last month, we covered the 30th anniversary of the Challenger disaster. While researching, I came across the story of Bob Ebeling. Ebeling was one of the five engineers who fought to ground the ...