A pair of new F-22 Raptors (US Air Force serial numbers 09-4179 and 09-4180) were accepted by the Air Force on 6 June 2011. These acceptances marked the ninety-ninth and one hundredth Raptors that have been turned over to the Air Force on or ahead of contract schedule. The milestone F-22s will be assigned to the 1st Fighter Wing at Langley AFB, Virginia. Raptor 4179 will be flown by pilots from the 94th Fighter Squadron. 4180 will be flown by pilots from the 27th FS.