A general view shows Syrian pro-government forces walking in the ancient Umayyad mosque in the old city of Aleppo in the foreground and the city's citadel in the background on December 13, 2016, after they captured the area.
After weeks of heavy fighting, regime forces were poised to take full control of Aleppo, dealing the biggest blow to Syria's rebellion in more than five years of civil war.

 / AFP / George OURFALIAN        (Photo credit should read GEORGE OURFALIAN/AFP/Getty Images)