WASHINGTON – Army Gen. Mark Milley, the nation's top military officer, said Thursday he was wrong to have accompanied President Donald Trump on a walk to a church through Lafayette Square, where he was photographed in his combat uniform with the presidential entourage.“My presence in that moment and in that environment created a perception of the military involved in domestic politics,” Milley said. “As a commissioned uniformed officer, it was a mistake that I have learned from, and I sincerely hope we all can learn from it.”The statement by the Joint Chiefs chairman risked the wrath of a president sensitive to anything hinting of criticism of events he has staged.