Photo on the Montana ANG (186th FS) F-16A 'Fighting Falcon' by Bob Nelson at the Grand Forks Air Force Base (GFAFB) 'Friends And Neighbors Day' on May 27th 1989.
The 186th Fighter Squadron converted from the F-106A to the F-16A 'Fighting Falcon' in mid-1987. The first aircraft were older block 5 and 10 models with some block 15 airframes also being delivered to the squadron. Main task for the unit was air defense, as with many ANG units who were equipped with the F-16. In 1991 the F-16s were brought up to the Air Defense Fighter (ADF) variant. This meant a serious leap in performance and capability of this squadron in their defensive role. This situation was maintained up until 2001 when the squadron started receiving more modern F-16C block 30 aircraft with a large intake. (Wikipedia)