Air Intelligence Information Report: Sighting of Unidentified Flying Object, 31 May 1952, South Korea

This document is a collection of Air Intelligence Information Reports regarding an unidentified aerial object sighted on 31 May 1952 near Chorwon, Korea. The primary sighting occurred around 0400 hours, involving a guard at a 6004th Aircraft Control and Warning Squadron site. The witness, a radar mechanic, reported a bright object that initially appeared like a falling star at approximately 3600 feet. The object descended to 2000 feet, stopped, and then climbed vertically to 3000-4000 feet. It exhibited erratic, jerky movements, changing direction instantaneously between East and West before climbing away at a 45-degree angle. The witness described the object as having a pulsating sound similar to an idling jet or pulse jet, and noted that it appeared to be a disk with a duller center and a brighter rim. Despite the visual sighting, the object was not detected by local radar, which the witness noted was unable to pick up targets within four miles of the site. An F-94 aircraft was scrambled to intercept the object, but the object faded from sight before contact could be made. The reports include detailed sketches of the object's flight path and altitude changes. Intelligence officers from the Far East Air Forces (FEAF) reviewed the reports, noting that this incident was likely the same as one attempted to be intercepted by an F-94 (referenced in Report 52-106). The official conclusion remained inconclusive, suggesting a faint possibility of a balloon, though no information on balloon releases was available. The document also includes a letter from a civilian researcher associated with the 'Extra-Terrestrial Research Organization' who was compiling reports of similar sightings from 1869 to 1952, indicating the broader context of UFO interest during this period. The reports are marked as unclassified and were subject to 12-year downgrading intervals.