WASHINGTON—On a warm night in early September, militants fired three mortars into Baghdad’s sprawling diplomatic quarter, home to the U.S. Embassy. The shells—launched by a group aligned with Iran—landed in an open lot, harming no one. But they triggered unusual alarm in Washington, where President Trump’s national security team conducted a series of meetings to discuss a forceful American response.

Source: Wall Street Journal January 13, 2019 10:30 UTC