Iran-backed militant groups have attacked U.S. troops in Iraq and Syria three times since the U.S. launched massive retaliatory strikes on Friday‚ killing six partner troops at one of the bases‚ according to reports. The U.S. struck 85 targets connected to Iran-backed militants in Iraq and Syria and the Iranian military command that oversees Tehran’s proxy operations on Friday in response to a Jan. 28 suicide drone attack that caused the first U.S. fatalities since the escalation of attacks...