Air Force Instruction 36-2618, The Enlisted Force Structure, sits in front of a captain Sept. 29, 2015, on Grand Forks Air Force Base, North Dakota. ?The Little Brown Book? is given to new enlisted Airmen to outline their responsibilities by rank. Each company grade officer who attended the Enlisted 101 class on Grand Forks AFB was given a copy of the book to help them understand the enlisted force structure. (U.S. Air Force photo by Airman 1st Class Ryan Sparks/Released)
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