May 30, 1952 — nr. Oshima, Japan
USAF Maj. William D. Leet, copilot on a C-54 transport mission at 8,500 feet near Oshima, Japan, sees a dark object hovering in clouds for 7 minutes. It disappears, speeding away in seconds. [Eberhart]
Blue Book Record Card:
Air Intelligence Report (AF-112):
Witness Statements:
Sources:
Loren E. Gross, The Fifth Horseman of the Apocalypse: UFOs, a History: 1952 January–May, Supplemental Notes, The Author, 2000, pp. 82–83;
Brad Sparks, Blue Book Unknowns Catalogue, Case 600, p. 136;
NICAP, “C-54 Crew Encounters Round Black Object”;