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The Analysis and Assessment of Gateway Process is a 29-page declassified document written by Lieutenant Colonel Wayne M. McDonnell. It explores "Hemi-Sync" audio techniques developed by the Monroe Institute, intended to synchronize brain hemispheres to achieve altered states of consciousness, such as and remote viewing .

For decades, when the document was released, Page 18 was noticeably absent. Page 18

Depending on the specific field you are looking into, "Page 18" may refer to: ANALYSIS AND ASSESSMENT OF GATEWAY PROCESS - CIA The Analysis and Assessment of Gateway Process is