Triangular UFO over Greenland seen by USAF pilots

Summary

In August 1952, two U.S. Navy pilots reported an unusual aerial phenomenon while tracking a scientific balloon near the coast of Greenland. They observed three white disk-shaped objects in a triangular formation that suddenly appeared alongside the balloon. The observers, from different positions in the aircraft, noted the objects had no aerodynamic features or propulsion trails. One pilot from the cockpit and the other from the astro-dome both confirmed the sighting. The objects accelerated from a standstill to supersonic speeds and vanished quickly. Although an optical illusion caused by sunlight reflection was considered, the observers' positions and the lack of air traffic in the area complicated this explanation.

The official evaluation suggested it might be a balloon, but the triangular formation and unusual acceleration did not match expectations. Weather data showed clear skies above 8,000 feet, supporting visibility. The pilots, deemed reliable, found no conventional explanation for what they saw. The report concluded there was no physical evidence and only one object was intentionally released from the balloon, adding mystery to the case.