(Khalid Mohammed | AP) Pro-Iranian militiamen and their supporters set a fire during a sit-in in front of the U.S. embassy in Baghdad, Iraq, Wednesday, Jan. 1, 2020. U.S. troops fired tear gas on Wednesday to disperse pro-Iran protesters who were gathered outside the U.S. Embassy compound in Baghdad for a second day as dozens of pro-Iranian militiamen and their supporters had camped out at the gates of the embassy in Baghdad, where they stayed the night. On Tuesday, dozens of the protesters had broken into the compound, trashing a reception area and smashing windows in one of the worst attacks on the embassy in recent memory.