Israel's Elbit Systems March 20 said it was awarded a three-year, potential $290 million contract by a customer in the Asia-Pacific region to upgrade its tanks. The customer was not identified. The upgrade program will provide the tanks with night operation capabilities by supplying a variety of advanced systems, such as gunner sights and fire control systems. Elbit Systems President and CEO Bezhalel (Butzi) Machlis said: "We are very pleased to be awarded this significant contract, demonstrating our unique capabilities…