By Chris Megerian WASHINGTON (AP) — While flying back to Washington aboard Air Force One on Wednesday night, a reporter asked President Donald Trump whether Elon Musk would pursue budget cuts at the Pentagon. His response might be confusing to anyone who hasn’t spent the last several days monitoring Musk’s account on X. Trump said Musk would be looking at Fort Knox, the legendary depository for American gold reserves in Kentucky. Why? “To make sure the gold is there,” Trump said. Another reporter seemed puzzled. Where would the gold have gone? “If the gold isn’t there, we’re going to be very upset,” Trump said. Musk, the world’s richest man, who was traveling with the Republican president aboard Air Force One, has spent days posting about this issue. “Who is confirming…