Project Blue Book Case #1128. On April 18, 1952, a bright object was observed over Bethesda, Maryland — the first of two Blue Book unknowns from this Washington, D.C., suburb. Bethesda's National Naval Medical Center (now Walter Reed National Military Medical Center) was where presidents and senior military officers received medical care, making it one of the most protected locations in the capital region.
April 1952 was in the early buildup phase. The appearance of an unknown over a suburb housing the president's hospital added to the growing pattern of UFOs near the nation's most sensitive facilities. The case was classified "Unknown."