SR-71

The SR-71 Blackbird was a high-speed, high-altitude reconnaissance aircraft used by the U.S. during the Cold War. Designed to fly faster than Mach 3 and at altitudes above 85,000 feet, it could quickly gather intelligence over enemy territories while avoiding anti-aircraft defenses. Its sleek, titanium body reduced heat from air friction at extreme speeds. The SR-71's advanced sensors and cameras provided critical intelligence while its speed and altitude made it nearly impossible to intercept. Although retired in the late 1990s, it remains one of the fastest and highest-flying aircraft ever built, symbolizing aerial innovation and strategic surveillance.