Past Preserved on Instagram: "The XB-70 Valkyrie was a groundbreaking aircraft developed by the United States in the 1960s that redefined what was technologically possible in aviation. Capable of exceeding Mach 3 (over 2,000 mph) and cruising at 70,000 feet (21 km), it operated at the edge of Earth’s atmosphere. Its sleek, futuristic design utilized a phenomenon known as compression lift, where the aircraft effectively “surfed” on its own shockwaves to increase efficiency at supersonic speeds. T

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