Worshippers chant slogans during Friday prayers ceremony on Jan. 17 as a banner shows Iranian Revolutionary Guard Gen. Qassem Soleimani, left, and Iraqi Shiite senior militia commander Abu Mahdi al-Muhandis, who were killed in Iraq in a U.S. drone attack on Jan. 3, and a banner which reads in Persian: “Death To America,” at Imam Khomeini Grand Mosque in Tehran, Iran, Friday, Jan. 17, 2020.