Skunk Works is an official alias for Lockheed Martin’s Advanced Development Programs (ADP) formerly called Lockheed Advanced Development Projects. Skunk Works is responsible for a number of famous aircraft designs including the U-2 the SR-71 Blackbird the F-117 Nighthawk and the F-22 Raptor. Its largest current project is the F-35 Lightning II which will be used in the air forces of several countries around the world. Production is expected to last for up to four decades.