Lockheed Martin hopes to cash in by upgrading F-16s

For nearly four decades, the F-16 has ruled the skies in the international market for fighter jet sales, a money-making flying machine for Lockheed Martin and its predecessor, General Dynamics. Now a number of nations are planning to spend billions to upgrade their fleets of older F-16s with modern "avionics," digital electronic controls, communications and combat systems.

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