While the F-35 Joint Strike Fighter program has logged recent improvements in readiness and sustainment, lawmakers remain frustrated by the persisting issues tied to the military's most expensive weapon system. Those frustrations led the chair of the House Armed Services Committee’s readiness panel to vow during an F-35 sustainment hearing Thursday that he would loudly object to what he called “a fool’s errand, a waste of money by the taxpayers”: procuring additional fighter jets “until we figure out how to...