Listed below are links to .pdf files at the National Security Agency; Freedom of Information Act, UFO results page. Found there are official copies of the original documents. Included in this first file are the distribution list/ routing, and a brief analysis of the event. The comments read:

a) [not readable]...necessary for a valid study of a UFO phenomenon.

[not readable]

b) The credibility of the many witnesses was high (an air force general, qualified aircrews, and experienced tower operators).

c) Visual sightings were confirmed by radar.

d) Similar electromagnetic effects (EME) were reported by three separate aircraft.

e) There were physiological effects on some crew members (i.e. loss of night vision due to the brightness of the object).

f) An inordinate amount of maneuver-ability was displayed by the UFO's.

The distribution of this report from defense intelligence includes the Secretary of Defense, Secretary of State, CIA, NSA, White House, the CSA and others.

*************This is the actual report*******************

http://www.nsa.gov/docs/efoia/released/ufo/ufo20.pdf

Also:
"Now You See It, Now You Don't" by Captain Henry S. Shields, HQ USAFE/INOMP (http://www.nsa.gov/docs/efoia/released/ufo/ufo16.pdf)

Joint Chiefs of Staff report concerning the sighting of a UFO in Iran on 19 September 1976, (http://www.nsa.gov/docs/efoia/released/ufo/ufo17.pdf)

Potentially related - it is a little hard to tell:
See the report of 9/24/76:
"UNTITLED (23 SEPT (DELETED) WITH PERSONAL REQUEST TO INVESTIGATE UFO SIGHTED"
CIA and Sept '76 (http://www.foia.cia.gov/search.asp?pageNumber=29&freqReqRecord=undefined&freqSearchText=undefined&txtSearch=UFO&exactPhrase=&allWords=&anyWords=&withoutWords=&documentNumber=&startCreatedMonth=&startCreatedDay=&startCreatedYear=&endCreatedMonth=&endCreatedDay=&endCreatedYear=0&startReleasedMonth=&startReleasedDay=&startReleasedYear=&endReleasedMonth=&endReleasedDay=&endReleasedYear=0&sortOrder=ASC)