Newer fighter jets like the F-22 Raptor, F-35 Lightning II, and China’s J-20 are undoubtedly the most advanced, featuring stealth, sensors, and networked warfare capabilities. But if the contest were based purely on speed, none of them would come close to the Soviet-era Mikoyan-Gurevich MiG-25 “Foxbat.” Developed at the height of the Cold War, the MiG-25 remains the fastest production fighter-interceptor ever built. Although officially limited t…