Federal agencies have opened at least three reviews into whether the company and its leader complied with disclosure protocols intended to protect state secrets, people with knowledge of the matter said.

SpaceX CEO Elon Musk's lawyers are advising him not to pursue higher security clearances. As the Wall Street Journal reports, that's because the mercurial entrepreneur could risk having to reveal his uent contacts with foreign nationals,

Sources told The Wall Street Journal that Musk’s drug use and contact with foreign nationals could lead to his existing security clearance being revoked if he attempts to upgrade it

Not even Elon Musk knows exactly what is on the U.S. spy satellite rockets his company blasts into space. SpaceX executives decided their founder and chief executive shouldn’t apply for the highest-level security clearance after lawyers warned his alleged drug use and regular contact with foreign governments could create problems for the company’s defense contracts,

SpaceX CEO Elon Musk's security clearance level precludes him from accessing some of the company's most sensitive national security programs, according to a new report.

Walter Isaacson, ‘Elon Musk’ author, Perella Weinberg Partners advisory partner and Tulane professor, joins 'Squawk Box' to discuss Elon Musk's challenge to lead the Department of Government Efficiency,