🇺🇸 USAF — Project Blue Book
In June 1966, a witness in Castle Rock, Colorado, observed an unidentified object in the sky. The event lasted between 15 and 35 seconds, and the object was moving rapidly from west to east. It was described as brown-silver in color with a bright pulsating light. In the first two sightings, the light was visible for 11 to 15 seconds, but in the third, it lasted around 30 seconds.
The report does not include photographs or physical evidence, but the witness confirmed seeing something unusual. The analysis suggests the object could be an unidentified aerial phenomenon. Although conventional explanations were not ruled out, the rapid movement and pulsating light generated interest. This case is another example of the many sightings from the 1960s that remain unresolved.