F-117 Nighthawk- was a single-seat, twin-engine stealth ground-attack aircraft. It was a product of Lockheed Skunk Works. The F-117 was the first operational aircraft to be designed around stealth technology. The Air Force retired the F-117 on 22 April 2008. Sixty-four F-117's were built, replaced by F-22 Raptor & F-35 Lightning.