Defense Secretary Pete Hegseth said Sunday that President Trump fired Air Force Gen. Charles “CQ” Brown, chairman of the Joint Chiefs of Staff, because he was “not the right man for the moment.” ...

The F.B.I. director, Kash Patel, the director of national intelligence, Tulsi Gabbard, and others told employees not to respond to a directive from Mr. Musk to summarize their accomplishments.