The Defense Department and Lockheed Martin have negotiated a significantly smaller scope for a forthcoming performance-based logistics sustainment contract for the F-35, opting for a "bridge" contract the company expects will yield less savings but instill confidence in its performance and set a foundation for a full PBL. The company in 2019 proposed a fixed-price, five-year sustainment contract for the Joint Strike Fighter , offering to invest $1.5 billion in spare parts and capacity that it projected would save about...