According to the document: A series of Photographic Interpretation Briefs will be published by NPIC, as a supplement to the…
Background The following memorandum was first released by the FBI in the 1970s, but did not gain notoriety until much…
According to the Defense Threat Reduction Agency (DTRA): "There are many misconceptions about nuclear weapons effects and a potential post…
Background Before the modern era, cryptography was concerned solely with message confidentiality (i.e., encryption)—conversion of messages from a comprehensible form…
For decades, an NSA document has circulated recounting an NSA employee's experience at a MUFON symposium in 1978. The memo…