2013 Event A successor to the SR-71 Blackbird is being built by Lockheed Martin. The company's Advanced Development Programs, known by the alias Skunk Works, has taken on the challenge to builde the SR-72, capable of flying at mach 6 with expected delivery in 2023 1990 Event SR-71 sets a transcontinental record, flying 2,404 miles in 1:08:17 1964 Event Lockheed SR-71 spy aircraft reaches 3,530 kph (record for a jet)
