PROJECT 10073 RECORD — Boston, Massachusetts, 7 April 1950

On the night of April 7, 1950, a watch supervisor at the Logan International Airport control tower in Boston, Massachusetts, observed an unidentified light. The witness, who identified himself as an Air National Guard Lt. Colonel with a background in Air Force Intelligence, was on duty with other controllers when he first noticed a deep blue, elliptoid light moving from the southwest to the northeast at approximately 2155 E.S.T. Using binoculars, he observed the light change from deep blue to white and back to blue, eventually separating into two distinct blue lights that rotated around one another. The object's elevation increased from 15 to 45 degrees above the horizon. The witness initially considered the possibility of searchlights but dismissed this theory because there were no visible beams and the cloud ceiling was at 16,000 feet. During the observation, a second object of definite mass was seen glowing red like molten metal for 10 to 15 seconds. A pilot from an approaching Northeast Airlines flight was requested to look for the objects but reported nothing unusual. The witness concluded that while he could not definitively identify the objects, he suspected they might be meteorological in nature, such as stellar coronae or luminous hydrometeors, noting that the overcast was filled with ice crystals. He emphasized that four controllers witnessed the event, which lasted until 2215 E.S.T. The official project record categorizes the incident as an inversion effect involving ice clouds and thin cirrus clouds, potentially distorting natural light sources.