Operation Upshot Knothole
Operation Upshot-Knothole was a series of 11 nuclear weapons test detonations conducted in early 1953 at the Nevada Proving Ground, orchestrated by the Atomic Energy Commission (AEC). Its stated objective was to develop and validate tactical nuclear weapons for battlefield use, including novel delivery methods such as nuclear artillery rounds fired from cannons. An estimated 18,000 to 21,000 Department of Defense personnel participated in the program.
| Date | 1953 |
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Significance to UAP Research
Operation Upshot-Knothole provides the organizational and geographical context for the alleged 1953 Kingman, Arizona Crash Retrieval. Arthur Stansel Jr., the primary witness to the Kingman crash, was present at Frenchman's Flat, Nevada as an AEC project engineer measuring blast effects on structures when, on May 20, 1953, he was called by Ed Doll — a physicist and project director for Upshot-Knothole — and directed to proceed to Kingman, Arizona the next day to investigate a downed craft. The AEC's institutional presence in the region, its personnel security infrastructure (need-to-know compartmentalization, oath-swearing protocols), and its classification authority under the Atomic Energy Act were all already in place and available to manage the recovery. Researchers note this as evidence that AEC bureaucratic machinery was adapted for — or already integrated into — crash retrieval operations.
Bill Uhouse's independent claim about the Kingman craft also supports a nuclear connection: the crash occurring during active nuclear detonation testing at a nearby range, and the dead occupants being reportedly transported to Los Alamos National Laboratory, the AEC's primary nuclear research facility.
Design and Testing Parameters
The Upshot-Knothole series tested both fission weapons and artillery-delivered nuclear rounds. Of the 11 shots, several produced yields in the low-kiloton range. The tests were conducted at the Nevada Proving Ground approximately 65 miles northwest of Las Vegas. Troops and equipment were deliberately positioned near blast zones to evaluate nuclear combat readiness — both for personnel survivability and equipment performance.