What You Need to Know: The Russian MiG-31 Foxhound, known for its remarkable ... Unlike the MiG-25, it has two seats, with the rear occupied by a dedicated weapon systems officer.

The MiG-31 Foxhound was the Soviet Union’s answer to emerging threats like cruise missiles, AWACS aircraft, and low-flying bombers. Equipped with a massive radar and long-range R-33 missiles, it could ...

Source: Globalsecurity.org and The National Interest. The MiG-31, which NATO calls Foxhound, made it's first flight in 1975 and was the MiG-25s successor.