Elon Musk met with the leader of the National Security Agency and U.S. Cyber Command this week, suggesting America's spy agencies won't escape the billionaire's efforts to reshape the federal government.

Elon Musk paid an unannounced visit to the National Security Agency on Wednesday and met with its chief, days after he called for an "overhaul" of the U.S.'s top cyberespionage service.

Elon Musk visited the National Security Agency on Wednesday, current and former U.S. officials said, meeting with leadership a week after saying the intelligence and cybersecurity outfit needed an overhaul.