A member of Iraqi Federal Police launches a rocket-propelled grenade near Mosul train station, Iraq, on March 21, 2017. Iraqi government forces battling Islamic State (IS) militants in Mosul's western side evacuated hundreds of civilians from Mosul's IS-held city center on Tuesday, as troop progress slowed down faced with strong resistance from IS militants, Iraqi officers said. (Xinhua/Cheng Shuaipeng)