In this photo taken by an individual not employed by the Associated Press and obtained by the AP outside Iran, anti-riot Iranian police prevent university students to join other protesters over Iran weak economy, in Tehran, Iran, Saturday, Dec. 30, 2017. A wave of spontaneous protests over Iran's weak economy swept into Tehran on Saturday, with college students and others chanting against the government just hours after hard-liners held their own rally in support of the Islamic Republic's clerical establishment. (AP Photo)