 The twin-engined MiG-25 reached speeds of over 3,000 km/h even at high altitude (over 70,000 feet) and it could be armed with radar-guided AA-6 Acrid air-to-air missiles.When the Soviets stationed large numbers in the Soviet Union and later in the GDR, NATO had to address this problem.The solution was provided by the McDonnell Douglas F-15 Eagle.