Rhino: Agencies – US Ambassador to the United Nations Linda Thomas-Greenfield said Monday that Iran will face “grave consequences” if it carries out any further attacks on Israel or US military personnel in the Middle East. “We will not hesitate to take action in self-defense,” Greenfield told the U.N. Security Council. “There should be no ambiguity. “The United States does not want to see further escalation. “We believe that what happened should be the end of the direct exchange of fire between Israel and Iran.