Air Intelligence Information Report: Unidentified Aerial Object Sighting, Guam, 19 December 1952

This Air Intelligence Information Report, dated 22 December 1952, details the sighting of an unidentified aerial object on 19 December 1952 near Andersen AFB, Guam. The report consolidates statements from three ground crew members of the 54th Strategic Reconnaissance Squadron, a Naval Officer, and two pilots of a B-17 aircraft. At approximately 0650K, the ground crew members observed a silvery, cylindrical object traveling at an extremely high rate of speed on a heading of 270 degrees. The object was described as having a bright silvery-white flame trailing from its aft section, with no visible exhaust or vapor trail. The object was estimated to be between 100 and 150 feet in length and was observed for less than 45 seconds before disappearing behind clouds. A similar object was reported by a Naval Officer 14 miles south of the base at the same time. Shortly thereafter, at approximately 0655K, the pilots of a B-17 aircraft, flying at 7000 feet, observed the same or a similar object while 115 miles from Guam. The pilots, who possessed considerable flying experience, noted that the object did not appear to be a conventional aircraft and was traveling at a speed significantly faster than a jet plane. The report includes detailed weather conditions at the time of the sighting and notes that no other aircraft were in the area, except for a Rescue SB-29 that had departed Andersen at 0648K. The investigating officer, Lt. Col. Walter L. Nicholls, concluded that there was no reason to doubt the validity of the observers' claims, noting that while the ground observers were not trained in aircraft identification, the pilots were experienced and explicitly stated the object did not appear to be a conventional aircraft. The official conclusion for the incident is listed as 'Unknown'.