F-18, Hornet
With the F-22 still unfit for combat, and the F-35 probably years away from service, the brunt of U.S. air power falls to the aging F/A-18. Having undergone extensive modifications and upgrades since its official introduction in the early 1980s, the F/A-18 comes in several variations — each of them designed to maintain America's air superiority — over any battlefield.