Triangular UFO sighted in La Puente in 1962

Summary

Three witnesses in La Puente, California, reported a triangular object with red and white lights in March 1962. The UFO hovered, moved slowly, and emitted a steady sound like an electrical transformer. Observers estimated its speed between 50 and 75 mph, and one drew the object with lights in specific positions. Initially thought to be a helicopter, its characteristics didn't match any known aircraft.

The classified report includes detailed testimonies, sketches, and responses to an Air Force questionnaire. Witnesses couldn't identify the object and suggested it might be a secret prototype. The sound and movement pattern raised doubts about conventional explanations, highlighting the unexplained nature of the sighting.