While leaders across the U.S. military and defense industry are pushing to bolster visibility over in their supply chains, Pentagon officials are continuing work to determine how a Chinese-sourced alloy found its way into the F-35 Joint Strike Fighter's turbomachine. That realization in recent months , which temporarily paused deliveries of the jet until the Defense Department acquisition chief OK’d their restart three weeks ago , has prompted and elevated a broader discussion over what officials call “ supply chain...