F-25™

Modern Marvels: Extreme Aircraft aired in season 10 in 2004. Discussion includes: The X-1 which first went supersonic and how it paved the way toward the X-43 Scramjet intended to achieve a hypersonic mach 15; Other speed record breakers like the X-15, SR-71, and U-2 spy plane; The YB-49 which evolved into the B-2 stealth bomber; The RQ-1 Predator and RQ-4 Global Hawk drones; And the evolution of American air superiority fighters from the F-15 into the new F-22.