A man holds a picture of Iran's supreme leader Ayatollah Ali Khamenai with Iranian Revolutionary Guards top commander Qasem Soleimani (L) during a demonstration in Tehran on January 3, 2020 against the killing of the top commander in a US strike in Baghdad. - Iran warned of "severe revenge" and said arch-enemy the United States bore responsiblity for the consequences after killing one of its top commanders, Qasem Soleimani, in a strike outside Baghdad airport. (Photo by ATTA KENARE / AFP)