President-elect Donald Trump's selection of retired Marine Corps Gen. James Mattis to be defense secretary offers few particulars on the four-star general's record regarding cybersecurity, but Mattis' views on an evolving military role to address emerging threats appears consistent with Trump's call for a more active approach to defending critical industries from cyber attacks. Mattis' most recent work at the Hoover Institution involves an extensive survey of the public's perceptions about the role of the military and its impact on...