The Defense Department is conducting a business case assessment to better understand its options for long-term sustainment of the F-35 and plans to release its findings this summer. The F-35 joint program office is currently negotiating a three-year sustainment contract with prime contractor Lockheed Martin that includes annual options for fiscal years 2021, 2022 and 2023. Program Executive Officer Lt. Gen. Eric Fick said during an April 22 joint hearing of the House Armed Services tactical air and land forces...