Both the MiG-25 and MiG-31 are Cold War-era tools designed to be lightning-fast interceptors with the MiG-25 also capable of reconnaissance. The USSR wanted to keep its secrets and couldn't afford ...

Source: Globalsecurity.org. The MiG-31 needs about 3,900 feet to take off. Source: Globalsecurity.org. Unlike the MiG-25, it has a backseat for the Weapons Systems Officer to operate the Zaslon radar.