1-56 — 1956-07-02 — Winchester, Massachusetts (42 deg 28' N, 71 deg 18' W)

Observation made by children playing outside, who called family attention. Object first appeared almost directly overhead, slightly north, moving in a tight dime-sized circle for approximately 1 minute. After completing four 360-degree turns, the object departed on a north-northwest course at estimated 20,000 feet and 700 mph. Disappeared below 30-degree elevation after approximately 8 seconds of straight travel. Reported by 1st Lt Malcolm S. McClintock at Air Force Cambridge Research Center.

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