Some 1,150 Su-9 fighters were built, and it became a major front line interceptor. An Su-9 was allegedly involved in the May 1960 shoot-down of Gary Powers and his U-2. The Su-9 was on an unarmed delivery flight in the area and the pilot was instructed to ram the U-2. One attempt was made but due to the speed differential it was a miss. In September 1959, a modified Su9 set a new altitude world record of 94,658ft. This example was originally coded '68 green'. c/n 0615308. On display at the Russian Air Force Museum. Monino, Russia.