Lockheed F-117 Nighthawk
This single-seat ground-attack jet used to be operated by the United States Air Force. It first started flying in 1983 and was acknowledged in 1991 for its role in the Persian Gulf War. Though this aircraft was strickly used on ground attacks, it was still known famously as the “Stealth Fighter”. The U.S. Air Force retired this plane in April 2008 because there were new aircrafts built.
Boeing X-37
This plane is actually an unmanned space drone operated by the United States Airforce, with the help of NASA. It was sent on a mission to test reusable space technologies then make its way back to earth. On the way back down, the Boeing X-37 re-entered Earth’s atmosphere at a speed of 16x the speed of sound. How crazy!