The Trump adviser had been originally set to receive a top-secret briefing on war plan but revelations of the meeting caused a change of course.

Billionaire Elon Musk took his campaign to cut the U.S. federal government into uncharted waters on Friday, holding an unprecedented top-level meeting at the Pentagon and calling for the prosecution of any Defense Department officials leaking "maliciously false information" about his visit.

Elon Musk is to receive a briefing on the US military’s top-secret war plans for China, according to two US officials, giving the wealthy businessman and presidential adviser insight into one of the Pentagon’s most closely guarded operational blueprints.