Arlington Heights radar-visual unidentified-object report — November 1961

The image appears to be a Project 10073 record card from Project Blue Book, which was the official project of the United States Air Force to investigate unidentified flying object (UFO) reports. A. (1) (3) NOT REPORTED. (2) THERE (5) (6) (9) NOT REPORTED. NONE J NONE REPORTED K. THE FOLLOWING STATEMENT WAS SENT WITH THE REPORT OF THIS SIGHTING: AT APPROXIMATELY 0755Z, 7 NOV 1961, SEVERAL EMPLOYEES OF MARTIN COMPANY AND ARMY PERSONNEL AT COMMUNICATOR (RE ARTY BRIGADE) OBSERVED THREE UNUSUAL RADAR RETURNS ON THE LONG RANGE RADAR. THREE OBJECTS WERE OBSERVED APPROACHING THE CHICAGO AREA FROM ESE WITH 30 SECOND SEPARATION AT SPEEDS IN EXCESS OF 4000 KNOTS (FOUR THOUSAND KNOTS) THE RADAR RETURN WAS VERY SHARP WITH THE VIDEO TILTED ABOUT 30 DEGREES DUE TO THE HIGH SPEED OF OBJECTS. THE FIRST TWO OBJECTS VANISHED IN THE GROUND CLUTTER AND DID NOT REAPPEAR, THE THIRD OBJECT VANISHED ABOUT 120,000 YARDS PRIOR TO REACHING THE GROUND CLUTTER.