DAMASCUS, SYRIA - SEPTEMBER 13: Smoke rises from Assad suburb in northeast of Damascus on September 13, 2015, after Syrian opposition forces attacked the regime controlled areas. (Photo by Stringer/Anadolu Agency/Getty Images)
DAMASCUS, SYRIA - SEPTEMBER 13: Smoke rises from Assad suburb in northeast of Damascus on September 13, 2015, after Syrian opposition forces attacked the regime controlled areas. (Photo by Stringer/Anadolu Agency/Getty Images)