The Pentagon was scheduled on Friday to brief Elon Musk on the U.S. military’s plan for any war that might break out with China, two U.S. officials said on Thursday.Another official said the briefing would be China focused, without providing additional details. A fourth official confirmed Mr. Musk was to be at the Pentagon on Friday, but offered no details.Hours after news of the planned meeting was published by The New York Times, Pentagon officials and President Trump denied that the session would be about military plans involving China. “China will not even be mentioned or discussed,” Mr. Trump said...