Happy birthday to the U.S. Air Force, which officially celebrates 76 years of aiming high, flying, fighting and winning on Monday.

On Sept. 18, 1947, the National Security Act of 1947 established the Air Force as a separate military branch. It is the second youngest branch of the U.S. armed forces after the U.S. Space Force, which was founded in 2019 and also falls under the Department of the Air Force.

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