Some of the design work performed in the development of the YB-49 proved to be valuable to #NorthropGrumman decades later in the advent of the B-2 Spirit. The first of these new YB-49 jet-powered aircraft flew on October 22, 1947 and set an unofficial endurance record of staying continually above 40,000 ft for 6.5 hours. #FlyingWingFriday | Northrop Grumman Corporation

During its design and development, the Northrop B-2 program was a "black" project requiring a secret clearance for all program personnel before its revelation to the public. They built this 44 years ago (1979), kept it classified until 1989. Between 1979 and 1989, many people would see the bomber flyover and immediately report it as a UFO because it looked too futuristic. Imagine what they built in the last five years. | Airline Secrets Exposed