FORT MONMOUTH, NEW JERSEY - 10-11 September 1951
On 10 and 11 September 1951, a series of incidents occurred in the area of Fort Monmouth, N.J. An initial sighting of an unidentified object was made on a radar set. Soon after the radar sighting, two Air Force officers in a T-33 aircraft unsuccessfully attempted to intercept an unidentified object. Later several more radar sightings were reported.
Status of Investigation
A complete investigation of this incident was carried out and will be reported in Project Grudge Special Report No.1. It has been tentatively determined that the T-33 pilots probably observed a balloon that had been launched a few minutes prior to their arrival in the area. Two of the radar sightings were returns from balloons and the others were probably due to weather phenomena and excitement of the student operators due to previous sightings. Only one radar return cannot be explained. The operator who observed this incident assumed the object was traveling over 700 mph because the radar set's automatic tracking would not follow the target. It is possible that the inability to track the object was due to his inability to properly operate the set under mental stress.