A four-ship consisting of an F-35 Lightning II, top

A four-ship consisting of an F-35 Lightning II, top left, an F-22 Raptor, bottom left, an F-86 Sabre, top right, and an F-16D Fighting Falcon, bottom right, fly in formation during the 2016 Heritage Flight Training and Certification Course at Davis-Monthan Air Force Base, Ariz., March 6, 2016. During the course, aircrews practice ground and flight training to enable civilian pilots of historic military aircraft and U.S. Air Force pilots of current fighter aircraft to fly safely in formations together. (U.S. Air Force photo by Senior Airman Chris Massey/Released)