November 5, 1990: Crews of six RAF Tornado jets report being over taken by a giant UFO whilst flying over Germany during an exercise. The pilots believe this could have been a test flight for the then top-secret US Air Force Stealth fighter. A file notes: “I believe any further information made available would only add fuel to the fire. Clearly the incident happened and clearly the pilots saw what they believe (with hindsight) to be a stealth aircraft. I doubt very much if the USAF or even the Soviet air force (if they were flying) would admit to anything.”