Happy Birthday to the United States Air Force! Established on Sept. 18, 1947, the U.S. Air Force celebrates 79 years of service to our nation. USS Constitution and her crew salute the generations of Airmen whose service reflects the Air Force’s core values: Integrity First, Service Before Self, and Excellence in All We Do. Huzzah! #AirForceBirthday #USAirForce #OldIronsides #USNavy #America250