Wall Street Journal: “As SpaceX deepened its ties with the national-security agencies in recent years, the company’s lawyers advised senior executives not to seek a higher security clearance for Musk that would give him access to details about sensitive programs SpaceX is involved in.” “The reason, these people said, was that Musk would have had to answer questions from the government about his contacts with foreign nationals and drug use… In internal discussions, the lawyers and executives posited scenarios in which Musk might inadvertently disclose secrets to foreign officials with whom he regularly speaks, the people said.