The SR-71 Blackbird was built by about 1,000 men in roughly 600 days. In total, 32 aircraft were built. The SR-71 could cross continents in just a few hours, and at 80,000 feet, the Blackbird could survey around 100,000 square miles of ground per hour. LA to DC: 64 minutes 20 seconds No other U.S. Air Force aircraft could fly faster or higher than the Lockheed SR-71 Blackbird. Alien technology right here on Earth, engineered and built by humans. | Patina Research