Stapfer. The MiG-21 resulted from a 1953 Soviet Air Force specification. The MiG-21 began production in 1959 and would continue in production until 1985, making it not only the most produced supersonic jet aircraft ever, but also the longest production run of any combat aircraft. It has been in use with nearly fifty different countries around the world and remains in use by some countries even today. This title includes inside and out coverage of the MiG-21F-13 (Fishbed C), PF (Fishbed D), PFM Fishbed F), U (Mongol A), and UM (Mongol B) variants. Illustrated with over 114 b/w and 100 color photos, 12 color drawings, 11 b/w drawings; 80 pages.