Syrians mourn outside al-Razzi hospital after a Syrian rebel rocket reportedly struck a government-held part of the northern Syrian city of Aleppo on June 15, 2015, killing at least 20 people and wounding dozens more. The Syrian Observatory for Human Rights said rebels had fired some 250 rockets at several districts in western Aleppo city in just four hours, causing massive damage including the collapse of an entire building. AFP PHOTO / GEORGE OURFALIAN        (Photo credit should read GEORGE OURFALIAN/AFP/Getty Images)