Smoke rises from the reception room of the U.S. embassy that was burned by pro-Iranian militiamen and their supporters, in Baghdad, Iraq, Wednesday, January 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 after pro-Iranian militiamen and their supporters had camped out overnight at the gates of the embassy. 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. (AP Photo/Khalid Mohammed)

A picture shows the entrance leading to the U.S. embassy in the capital Baghdad on January 2, 2020, which was damaged the day before by Hashed supporters. - The U.S. embassy siege by pro-Iran protesters in Baghdad lasted just over a day, but analysts warn it could have lasting implications for Iraq's complex security sector and diplomatic ties. On Tuesday, hundreds of Hashed supporters stormed the high-security Green Zone and besieged the U.S. embassy. The ease with which they breezed past U.S.-trained forces demonstrated the Hashed's dominance in Iraq, said Harith Hasan, an expert at the Carnegie Middle East Center. (AFP Photo/Ahmad al-Rubaye)

A picture shows the entrance leading to the U.S. embassy in the capital Baghdad on January 2, 2020, which was damaged the day before by Hashed supporters. - The U.S. embassy siege by pro-Iran protesters in Baghdad lasted just over a day, but analysts warn it could have lasting implications for Iraq's complex security sector and diplomatic ties. On Tuesday, hundreds of Hashed supporters stormed the high-security Green Zone and besieged the U.S. embassy. The ease with which they breezed past U.S.-trained forces demonstrated the Hashed's dominance in Iraq, said Harith Hasan, an expert at the Carnegie Middle East Center. (AFP Photo/Ahmad al-Rubaye)

Members of Iraq's security forces stand guard in front of the U.S. embassy in the capital Baghdad, after an order from the Hashed al-Shaabi paramilitary force to supporters to leave the compound on January 1, 2020. Thousands of Iraqi supporters of the largely Iranian-trained Hashed had encircled and vandalized the embassy compound yesterday, outraged by U.S. air strikes that killed 25 fighters of the military network over the weekend. (AFP Photo/Ahmad al-Rubaye)

Pro-Iranian militiamen and their supporters are seen through a broken window of a burned checkpoint in front of the U.S. embassy in Baghdad, Iraq, Wednesday, January 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 pro-Iranian militiamen and their supporters had camped out overnight at the gates of the embassy. 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. (AP Photo/Khalid Mohammed)

Iraqi counter-terrorism forces stand guard in front of the U.S. embassy in the capital Baghdad on January 2, 2020. The U.S. embassy siege by pro-Iran protesters in Baghdad lasted just over a day, but analysts warn it could have lasting implications for Iraq's complex security sector and diplomatic ties. On Tuesday, hundreds of Hashed supporters stormed the high-security Green Zone and besieged the U.S. embassy. The ease with which they breezed past U.S.-trained forces demonstrated the Hashed's dominance in Iraq, said Harith Hasan, an expert at the Carnegie Middle East Center. (AFP Photo/Ahmad al-Rubaye)