More older MiG-21's at Rothenburg, belonging to FAG-15. On the left the oldest trainerversion is visible, being a small-tailed MiG-21U-400. Second on the left is a MiG-21US (or U-600), second on the right a MiG-21SPS and on the right a MiG-21UM. These four MiG's probably were (temporary) stored at the time. Advantage of this particular tough hardware was the fact it could easily be brought back in service.