All 79 documents were found through government archives and Freedom of Information Act (FOIA) request libraries. They have been declassified for public release. Any information that falls under FOIA’s nine exemptions has been redacted. The exemptions protect against certain harms, such as an invasion of personal privacy, law enforcement investigations or geological information on wells. These images have been created by the US government. They are uncopyrighted and free for public use.

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