US Army Secretary Dan Driscoll is stepping down after 18 months on the job, the White House said Monday, in the latest departure of a top military leader during the Trump administration.No reason was given for the departure of Driscoll, who is a friend of Vice-President J.D. Vance, but tensions with Defence Secretary Pete Hegseth have been widely reported. It marks the latest in a series of shake-ups of top military leadership, with the army especially seeing major upheaval.“Secretary Driscoll...