This photo released on Sept. 10 by the Syrian Civil Defense group, known as the White Helmets, shows smoke rising from an airstrike, in Hobeit village, near Idlib, Syria.
Syrian Civil Defense White Helmets via AP
A member of the Syrian Civil Defense, also known as the "White Helmets," walking through the wreckage of their center, which was destroyed Thursday by government forces in the town of al-Tamana in rebel-held Idlib province.
Omar Haj Kadour/AFP/Getty Images
A volunteer rescue team attempts to put out a fire in the Syrian city of Maaret al-Numan, in the rebel-held province of Idlib, on Wednesday, following airstrikes reported by a U.K.-based monitoring group.
Amer Alhamwe/AFP/Getty Images