U.S. Ambassador to the United Nations Nikki Haley said Saturday that the United States is “locked and loaded” if the Syrian President Bashar Assad’s regime uses chemical gas again in the country. Haley made the remarks at a fiery meeting of the U.N. Security Council, in which Russia and the U.S. traded barbs over the decision of the U.S., France and the United Kingdom to launch strikes in Syria on Friday in response to the alleged use of chemical weapons last week in Douma. While the Trump administration has said the strikes are now over, with Trump declaring: “Mission Accomplished!”...