Biographer Walter Isaacson and others close to Musk have previously described Musk’s periods of extreme productivity—and extreme temper—as “demon mode.”

Boeing has lost more than $2 billion producing the Next Air Force One after President Donald Trump renegotiated the deal in his first term.

Elon Musk used his new government efficiency role to stop by the operations of his competitor Boeing to look into the long-delayed efforts to renovate two 747 jets into the next generation of Air Force One jets,