Northrop YB-49 flying wing makes a test flight in 1948 (USAF)
Northrop YB-49 flying wing
Northrop YB-49 flying wing makes a test flight in 1948 (USAF)
Northrop YB-49 flying wing makes a test flight in 1948 (USAF)
Northrop YB-49 flying wing makes a test flight in 1948 (USAF)
