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This photo from a test in the late 1960s with a 10-degree cone suspended in the Tunnel E facility at Arnold Air Force Base, Tenn. (U.S. Air Force photo)
No camera details available.
This photograph is considered public domain and has been cleared for release.
If you would like to republish please give the photographer appropriate credit.
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regarding use of images of identifiable personnel, appearance of endorsement, and related matters.