Zahran Alloush, head of the Jaish al-Islam (Islam Army) Syrian rebel group, speaks during the wedding of a fighter in the group on July 21, 2015, in the rebel-held town of Douma, on the eastern edges of the Syrian capital Damascus. Alloush, head of the powerful Jaish al-Islam Syrian rebel group, was killed along with five other commanders on December 25, 2015, east of Damascus, the Syrian Observatory for Human Rights and Syria's opposition said. 
 / AFP / AMER ALMOHIBANY        (Photo credit should read AMER ALMOHIBANY/AFP/Getty Images)