Firefox is a 1982 U.S. action film produced, directed by and starring Clint Eastwood. It is based upon the 1977 novel of the same name by Craig Thomas.
A joint AngloAmerican plot is devised to steal a highly advanced Soviet fighter aircraft MiG31, NATO code name Firefox which is capable of Mach 6, is invisible to radar, and carries weapons controlled by thought. Former United States Air Force Major Mitchell Gant Eastwood, a Vietnam veteran and former POW, infiltrates the Soviet Union, aided by his ability to speak Russian due to his having had a Russian mother and a network of Jewish dissidents and sympathizers, three of whom are key scientists working on the fighter itself. His goal is to steal the Firefox and fly it back to friendly territory for analysis.However, the KGB has got wind of the operation and is already hot on Gants tail. It is only through the sympathizers that Gant remains one step ahead of the KGB and reaches the air base at Bilyarsk, where the Firefox prototype is under heavy guard. The dissident scientists working on the Firefox help Gant infiltrate the base. Dr. Pyotr Baranovich Nigel Hawthorne, one of the scientists, informs Gant that there is a second prototype in the hangar that must be destroyed. The diversion will allow Gant to enter the hangar and escape with the first Firefox. Gant knocks out Lt. Colonel Yuri Voskov, a Soviet pilot assigned to take the first prototype on its maiden flight during a visit from the Soviet First Secretary. The scientists attempt the destruction of the second prototype to give Gant time to suit up and start the first fighter, but the second prototype is not destroyed, and the scientists are killed by the guards. Fortunately for Gant, he escapes the hangar and lifts off just as the First Secretary arrives. ........
Source: Wikipedia