A P-51 Mustang rests on the flight line during the

A P-51 Mustang rests on the flight line during the 2017 Heritage Flight Training and Certification Course at Davis-Monthan Air Force Base, Ariz., Feb. 10, 2017. The modern aircraft that participated in this year's HFTCC were the F-35 Lightning II, the F-22 Raptor, the F-16 Fighting Falcon and the A-10C Thunderbolt II. The historic aircraft included the P-51 and T-51 Mustang, the P-40 Warhawk, the P-38 Lightning, the P-47 Thunderbolt, the T-33 Shooting Star and the F-86 Sabre. (U.S. Air Force photo by Airman 1st Class Giovanni Sims)