The quest to secure North American airspace during the Cold War drove aviation engineering to the outer thresholds of speed, altitude, and technological daring. The vintage archival footage showcased in this comprehensive documentary has been upscaled and restored, appearing in authentic colorized versions to preserve the reality of these high-altitude programs. The fundamental concept of the interceptor originated during the First World War when the Royal Navy Air Service developed the Twin Blackburn seaplane to counter German Zeppelin raids over London. By the Second World War, the rocket-powered Messerschmitt Me 163 Komet demonstrated the extreme climb rates required to destroy enemy heavy bombers, pioneering the swept delta wings designed by Alexander Lippisch. Following the Soviet Union’s first successful atomic detonation in August 1949, the United States Air Force realized that su

Source: The Mach 3 Frontier: The Secret Canceled U.S. Century Series Aircraft