On August 4, 1990, two young men walking in the Cairngorms National Park in Scotland saw something remarkable — a diamond-shaped object hovering in the sky. Frightened by the sight, the men hid behind some bushes and continued observing the strange craft. Soon a Royal Air Force jet entered the scene and circled the object before heading back on course. One of the witnesses was able to snap some photos of the incident and presented the best one to the local newspaper. The photo was never published, however, and instead handed over to the Ministry of Defense which classified the image. An RAF officer hid a copy of the photo inside his desk and 32 years later the now retired officer, 83-year-old Craig Lindsay, decided to release it to the public. The photo shows exactly what the two men described seeing that day: a diamond-shaped UFO with an RAF jet nearby. The object remains an enigma.