SOVIETS SHOT DOWN AT LEAST TWO BLACKBIRDS IN THE 1980'S

The Soviets shot down at least two Blackbirds in the 1980's. This was the reason for the shutdown of the program in 1989. 

The elements not marked with an x are all elements that are found in molten salt reactors. 

29 January 1986

The USSR's Height 611 UFO crash of 29 January 1986 and the analysis of the samples of the taken from the crash site are consistent with materials used by the Blackbird. Of the materials found at the crash site one of the most interesting was a carbon based mesh. Which consisted of quartz filaments 17 microns thick, and golden wires inside each filament. The outer edges of the Blackbird used a fiberglass based composite to reduce its radar cross section. They also found titanium. Researchers that worked the site also came down with symptoms consistent with radiation poisoning. 

http://en.wikipedia.org/wiki/Height_611_UFO_incident

10 August 1989

An unsubstantiated UFO case comes to us from Russia. According to the reports, not far from the city of Prohlandnyi at 1:00 AM, on August 10, 1989, Soviet military radar units picked up an unidentified flying object. An attempt was made to contact the craft, without success. The UFO was classified as "hostile." Russian defenses were put on alert, and Mig-25s were put in the air to find and identify the UFO.Soviet military radar units picked up an unidentified flying object. An attempt was made to contact the craft, without success. The UFO was classified as "hostile." Russian defenses were put on alert, and Mig-25s were put in the air to find and identify the UFO.

http://ufos.about.com/od/ufofolkloremythlegend/p/russia1989.htm

13 November 1989 

Bob Lazar appears on Las Vegas television with George Knapp.

22 November 1989

Air Force SR-71 program officially terminated.