The F-35 Joint Strike Fighter's sustainment price tag is slowly dropping after being one of the Defense Department's costliest combat aircraft for decades, the F-35 Joint Program Office told Inside Defense . “We have continued to reduce sustainment costs through growth and maturation of the F-35 enterprise including JPO Product Support Manager efforts to drive down contract costs; better alignment of U.S. services requirements and budgets; and an active cost-reduction initiative pipeline,” JPO spokesman Russell Goemaere said in an email...