Demonstrators burn the U.S. and British flags during a protest against the assassination of the Iranian Major-General Qassem Soleimani, head of the elite Quds Force, and Iraqi militia commander Abu Mahdi al-Muhandis who were killed in an air strike in Baghdad airport, in Tehran, Iran January 3, 2020. WANA (West Asia News Agency)/Nazanin Tabatabaee via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.