A U.S. Secret Service agent stands guard near the White House after a man shot himself in front of the White House, Washington D.C., the United States, on March 3, 2018. The man who shot himself in front of the White House on Saturday was dead, said local police. The man, who was not identified yet, was in a large crowd when he fired the gun, the Washington Post reported, citing witnesses. (Xinhua/Yang Chenglin)