‘What Did You Tell My Wife?’: 25 Years Since STS-39 (Part 1)

The Infrared Background Signature Survey (IBSS), attached to a deployable Shuttle Pallet Satellite (SPAS), was one of the principal payloads aboard STS-39. The eight-day flight was the longest shuttle mission ever conducted in support of the Department of Defense. Photo Credit: NASA, via Joachim Becker/SpaceFacts.de

Thirty years ago, the loss of Challenger, on 28 [...]