Company pilot Vance Breese makes the first flight of the North American NA-73, the prototype for the P-51 Mustang, at Inglewood, Calif. During World War II, P-51 pilots would record more than half of the air-to-air victories in Europe, and the aircraft would serve as long-range bomber escort in the Pacific.
The rate of building B-21 bombers would speed up if the fiscal 2026 defense budget passes. But it remains unclear how much capacity would be added, and whether the Air Force would simply build the bombers faster, or buy more.