The Pentagon will hear a briefing Friday on Lockheed Martin's proposal for a five-year, fixed-price performance-based logistics sustainment contract for the F-35 -- a deal that could set the stage for a future multiyear sustainment deal. The proposed contract -- which Lockheed first pitched to officials informally last fall -- would be the first of its kind for the program. The Pentagon has established a Joint Independent Assessment team, led by Navy acquisition executive Hondo Guerts, to assess its merits...