Lockheed Martin Aeronautics Co., Fort Worth, Texas, is being awarded a $422,063,723 modification with cost-plus-incentive-fee line items to a previously awarded advance acquisition contract (N00019-12-C-0004) for recurring sustainment support for F-35 aircraft. Sustainment support to be provided includes ground maintenance activities, action request resolution, depot activation activities, Automatic Logistics Information System operations and maintenance, reliability, maintainability, and health management implementation and support, supply chain management, and activities to provide and support pilot and maintainer initial training. Work will be performed in Ft. Worth, Texas; El Segundo, Calif.; Warton, United Kingdom; Orlando, Fla.; Nashua, N.H.; and Baltimore, Md., and is expected to be completed in October 2014. This contract combines purchases for the U.S. Air Force (44.6 percent), U.S. Marine Corps (29.7 percent), the U.S. Navy (15.8 percent); and the governments of the United Kingdom (4.3 percent); the Netherlands (2 percent); Australia (1.2 percent); Turkey (.7 percent); Italy (.6 percent); Canada (.5 percent); Norway (.4 percent); and Denmark (.2 percent). The Naval Air Systems Command, Patuxent River, Md., is the contracting activity. (Source: DoD, 10/31/13) Gulf Coast note: Eglin Air Force Base, Fla., is home of the F-35 training center.