The MiG-25 “Foxbat” is a supersonic interceptor and reconnaissance aircraft. The prototype flew in 1964 and entered service in 1970 with an operational speed of Mach 2.83 but if needed Mach 3.2 possibly damaging the engines. The MiG-25 caused concern for the U.S. who demanded increases in the performance of the F-15 Eagle under development. The MiG-25s large wings gave the impression of a high weight of the stainless steel used to manufacture the MiG-25.