Contrails (Air Force Academy)
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Contrails is a book issued to new cadets entering the United States Air Force Academy. It contains information on United States Air Force and United States military history; Academy history; notable Academy graduates; aircraft, satellites, and munitions in the current U.S. Air Force inventory; and famous (usually patriotic or leadership-related) quotes. Cadets in their fourth class (freshman) year are expected to memorize most of the information from Contrails—much of it verbatim.