The United Nations denounced a “war crime” in Syria when a “chilling” investigation found that sarin nerve gas was used against “civilians including children” in three rebel-held suburbs of Damascus. Children, affected by what activists said at the time was a gas attack, breathe through…

United Nations Secretary-General Ban Ki-moon speaks during a news conference at the United Nations Headquarters in New York, Sept. 9, 2013. UNITED NATIONS—U.N. Secretary-General Ban Ki-moon says he will urge the Security Council to demand that Syria transfer its chemical weapons stocks to areas in…