The F-35 Joint Program Office determined last October that it will need about $13.7 billion more than previously planned for sustainment through fiscal year 2031, according to a Government Accountability Office report . JPO projects it will need $50.8 billion total from the Air Force, Navy and Marine Corps from FY-27 to FY-31, the report states, whereas the military had budgeted for about $38.1 billion over that timeframe. Along with the projected $12.7 billion shortfall, more funding is needed to...