April 12, 1953 — Sweetwater, NV
4:10 p.m. Ten round, flat, metallic objects changing formation are observed traveling at a high rate of speed at an estimated altitude of 7,500 feet over Sweetwater, Nevada. No trail, sound, or exhaust are noted. The objects pass under the right nacelle of the observers’ C-47 aircraft, which is en route to Stead AFB [now Reno Stead Airport]. The copilot takes control of the aircraft and turns to the right in a tight 300° turn for a better view. The objects are then picked up unassisted by two more members of the crew. The objects are seen in a right turn of a greater radius than that of the C-47 and at a lower altitude. They are observed for approximately 120° of their turn and disappear on a heading of 300°. Observers are unable to estimate the speed of the objects because of the distance and the large turn radius. [Eberhart]
Robert Work, Lt. Col, USAF, Director of Intelligence, Case Synopsis:
Case synopsis, likely from one of the Special Reports:
Sources:
Brad Sparks, Blue Book Unknowns Catalogue, Case 957, p. 197;
Letter from J Allen Hynek to Robert Olsson, in Blue Book files;
NICAP, “Ten Round Flat Objects Changing Formation”;