The scientists cause an explosive disruption, but the second prototype is undamaged. 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 diversion will allow Gant to enter the hangar and escape with the first Firefox. Pyotr Baranovich, one of the scientists, briefs Gant on the operation of the aircraft but warns him that there is a second prototype in the hangar that must be destroyed. The dissidents working on the Firefox help Gant infiltrate the base. It is only through the dissidents that Gant remains one step ahead of the KGB and reaches the air base at Bilyarsk, where the Firefox prototype is under heavy guard. However, the KGB has got wind of the operation and is already looking for Gant. His goal is to steal the Firefox and fly it back to friendly territory for analysis. Former United States Air Force Major Mitchell Gant, a Vietnam veteran, ex member of the Aggressor squadron and former prisoner of war, infiltrates the Soviet Union, aided by his ability to speak Russian (due to his having had a Russian mother) and a network of Soviet dissidents, three of whom are key scientists working on the fighter itself. A joint British-American plot is devised to steal a highly advanced Soviet fighter aircraft ( MiG-31, NATO code name 'Firefox') which is capable of Mach 6 ( hypersonic flight), is invisible to radar, and carries weapons controlled by thought.

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