American government labs are facing a “growing threat” of espionage from foreign adversaries, former Energy Department and national security officials told lawmakers Thursday, with some Chinese researchers raising alarms by collaborating on “nuclear weapons work” with US colleagues. Two former Department of Energy (DOE) undersecretaries for science and an ex-US counterintelligence officer told members of the Senate Energy and Natural Resources Committee that the scientific espionage was ripping off American innovations and using them to develop weapons and other tech. “China puts tremendous pressure in appropriating this innovation and then manufacturing it,” said Paul Dabbar, the former energy undersecretary for...