December 2, 2012
I have recently managed to identify a document which contained a highly detailed Unknown Track Report Summary for the year 1986. It was a part of a document which was formerly classified SECRET and was as marked a "privileged document". The area it covers was the ANR (Alaskan NORAD Region).
The other document is from the 11th Tactical Control Group, for the same year from Jan to Sept.
Look carefully at the unknowns, and the remaining unknowns, including those that were intercepted or attempted intercepted and remain unknown.