With its sleek delta wing and increased firepower, the F-16XL was a powerhouse that could have changed modern air combat. So why did the U.S. Air Force turn it down? From supersonic speed to unmatched ...

Try contemplating the F-16XL, which was a delta-wing model that could have changed the F-16 program – maybe for the better. In 1977, the F-16XL was meant to replace the variable sweep wing F-111 ...