Meet the Air Force’s Secret SR-72 Hypersonic combat-aircraft

The rumors SR72B, SR72C, SR72D were the secret planes being tested fitted with the latest techs for 6th gen fighter planes. Support us: The SR-72 is a new hypersonic demonstrator aircraft to be developed by Lockheed Martin under its Skunk Works or Advanced Development Programs, to meet the requirements of the United States Air Force (USAF).