In the background of International aerospace salon (MAKS) there is an aircraft park of abandoned airplanes. Unfortunately, the territory is surrounded by a fence but many things can still be seen. The legendary Buran is located here as well, by the way.
The Sukhoi Su-15 (NATO reporting name 'Flagon') was a twin-engined supersonic interceptor developed by the Soviet Union in the 1960s.
The Su-15UT (NATO "Flagon-C"). Airplanes like Su-15 had been in arsenal of Russia till 1994.
The Su-15s are closely related to interception of those planes that have violated the air space of the USSR. One such case occurred in 1978 in Karelia when Boeing-707 that flied from Paris to Anchorage violated the Soviet border near Murmansk. Pilots of Boeing-707 were asked to land but with no success and the plane was brought down.
Another incident took place in 1983 when a passenger airplane from South Korea violated the border of the USSR in the region of Kamchatka and was annihilated. It is believed that this resulted in death of 269 people who were aboard Boeing-707.
In 1981 Su-15 performed a successful ram attack of the CL-44 that had violated the border from the side of Iran. The pilot of the Su-15 had ejected successfully and was awarded the Red Star.