NARSARSSUAKAFB GREENLAND unidentified aerial event — December 18, 1952

Description of Incident An unidentified aerial object was sighted to the northwest of this air base by an Air Force Staff Sergeant and a civilian. PD OBJECT APPEARED TO CLIMB VERTICALLY THEN LEVEL OFF THEN AGAIN AS A VERTICALLY DIRECT ICN AND DISAPPEAR PD OBJECT EMITTED BLACK TRAIL AT EXCEEDING CE ASCENT GRADUALLY BECOMING LIGHTER AND VISIBILITY EXCELLENT CMA STATION CLAM, ED SPEED UP ALTITUDE UNKNOWN TD SLOW ASPECT WITH GRADUAL ACCELERATION TD AIRCRAFT TD AREA WEP.E CLM LZ- C-24 A-16 56-17 PD SIGHTING REPORTED AT ESA TERRA ID NO FURTHER INFO 1/20/1572 DEC JERC