WASHINGTON (Reuters) - With the latest U.S. missile strikes, President Donald Trump appears to have reset America’s red line for military intervention in Syria over the use of chemical weapons. What’s unclear is where that red line now stands. The United States said its strikes were a response to President Bashar al-Assad’s chemical weapons attack on April 7 that administration officials say employed chlorine and perhaps even sarin, a more deadly nerve agent. “A large body of information indicates that the Syrian regime used chemical weapons,” U.S. Ambassador to the United Nations Nikki Haley told the U.N. Security Council on...