During the Cold War, the US military developed top secret aircraft at the Air Force facilities at Groom Lake, also known as Area 51. Decades after the projects were finished, these designs remained classified. Although these planes were "technology demonstrators" and were never put into service, they were crucial for testing systems and technologies that are part of modern military and civilian aircraft alike. Read the stories and see photographs of three of these projects (one of which only exists in photographs, as the planes are still missing) at UrbanGhosts. http://www.urbanghostsmedia.com/2011/04/top-secret-technology-demonstrator-aircraft-declassified/
During the Cold War, the US military developed top secret aircraft at the Air Force facilities at Groom Lake, also known as Area 51. Decades after the projects were finished, these designs remained classified. Although these planes were "technology demonstrators" and were never put into service, they were crucial for testing systems and technologies that are part of modern military and civilian aircraft alike. Read the stories and see photographs of three of these projects (one of which only exists in photographs, as the planes are still missing) at UrbanGhosts. http://www.urbanghostsmedia.com/2011/04/top-secret-technology-demonstrator-aircraft-declassified/