Forty years after the Challenger disaster, NPR explores the engineers' last-minute efforts to stop the launch, their decades of guilt and the... 40 years after Challenger: Lingering guilt and lessons ...

BRIGHAM CITY, Utah — One of the five engineers at NASA who raised warnings before the 1986 Challenger shuttle disaster has died at age 89. Ebeling and the other engineers for NASA contractor Morton ...

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 was anxious and angry as he drove to work on the morning of Jan. 28, 1986. He kept thinking about the space shuttle Challenger, cradled on a Florida launchpad 2,000 miles away. Ebeling ...