The U.S. Secret Service said on Monday it was aware of a post by billionaire Elon Musk on the X social media platform musing about an absence of assassination attempts on President Joe Biden and Vice President Kamala Harris.

Plati, who has served the Secret Service for 27 years, is retiring on his anniversary with the agency, CNN reports. A source close to the situation revealed that Plati had been contemplating retirement for over a year, discussing the decision extensively with his family.