🇺🇸 USAF — Project Blue Book
A civilian witness observed an oval, silver object the size of a nickel at approximately 250 feet altitude, stationary in the sky. The object remained still for 10 minutes. Although it could initially appear as a UFO, authorities confirmed it was a balloon. This case is interesting for its detailed description and official confirmation, helping to understand how aerial phenomena were differentiated in the 1950s.