September 18,  2017 - The United States Air Force observes its 70 years of proudly serving as a separate military branch that it became on September 18, 1947 when President Truman signed the National Security Act establishing a new defense organization ... with the Army Air Corps becoming the U.S. Air Force ... an independent service equal to the U.S. Army and U.S. Navy.  (Image created by USA Patriotism! from photos provided by the U.S. Air Force)

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