The sixteenth C-5 upgraded under the Reliability Enhancement and Re-engining Program was delivered to the US Air Force from the Lockheed Martin facility in Marietta, Georgia, on 23 December 2013. A US Air Force aircrew ferried new C-5M (Air Force serial number 87-0036) to Dover AFB, Delaware. This delivery flight was the fourth Super Galaxy returned to the Air Force in thirty-two days and the sixth and final delivery for 2013.