Facebook mogul’s sudden appearance is increasingly typical of freewheeling West Wing during Donald Trump’s second term, which president has reportedly nicknamed ‘Grand Central Terminal’

Air Force leaders learned that lesson earlier this year when they arrived for a top-secret briefing with Trump in the Oval Office, which according to NBC News was scheduled for them to discuss plans for America’s sixth-generation fighter aircraft, dubbed the F-47 in a nod to Trump’s status as the 47th President of the United States.

As the generals were going over the details of the super-stealthy plane, which Trump has called the most advanced, capable and lethal combat aircraft platform ever built, they were startled by the appearance of Meta CEO Mark Zuckerberg popping into the Oval Office.

According to NBC, White House officials became concerned that Zuckerberg, one of the wealthiest men in the world, lacked the security clearance required to be present for talks about such a sensitive national security matter.