Fighters from the Jaish al-Islam (Islam Army), the foremost rebel group in Damascus province, look at picture of their late cheif Zahran Alloush who was killed on December 25, 2015, as they sit on the front line in Jobar, on the eastern edge of the Syrian capital on January 4, 2016. Jaish al-Islam has fought off both government forces and IS jihadists in its Eastern Ghouta bastion, east of the capital. 
 / AFP / AMER ALMOHIBANY        (Photo credit should read AMER ALMOHIBANY/AFP/Getty Images)