A picture taken on March 14, 2014 shows the citadel (background) of the ancient oasis city of Palmyra, 215 kilometres northeast of Damascus, over looking the city. From the 1st to the 2nd century, the art and architecture of Palmyra, standing at the crossroads of several civilizations, married Graeco-Roman techniques with local traditions and Persian influences. AFP PHOTO/JOSEPH EID (Photo credit should read JOSEPH EID/AFP/Getty Images)
Emergency responders rush following a reported barrel bomb attack by government forces in the Al-Muasalat area in the northern Syrian city of Aleppo on November 6, 2014. Syria has asked Russia to speed up delivery of S-300 anti-aircraft missiles, concerned about a possible US attack, Syrian Foreign Minister Walid Muallem said in an interview published Thursday. AFP PHOTO/AMC/TAMER AL-HALABI (Photo credit should read TAMER AL-HALABI/AFP/Getty Images)
MAJDAL ANJAR, LEBANON - NOVEMBER 12: A Syrian girl sits on bags of firewood in a makeshift camp for Syrian refugees only miles from the border with Syria in the Bekaa Valley on November 12, 2013 in Majdal Anjar, Lebanon. As the war in neighboring Syria drags on for a third year, Lebanon, a country of only 4 million people, is now home to the largest number of Syrian refugees who have fled the conflict. The situation is beginning to put huge social and political strains on Lebanon as there is currently no end in sight to the war in Syria. (Photo by Spencer Platt/Getty Images)
The shadow of an armed member of the Popular Front for the liberation od Palestine (PFLP) flashing the sign for victory is seen behind a Palestinian flag at the Palestinian refugee camp of Ain El-Helweh, near the southern Lebanese coastal city of Sidon, as they celebrate the attack by two Palestinians on a synagogue in Jerusalem on November 18, 2014. Two Palestinians armed with a gun and meat cleavers burst into a Jerusalem synagogue and killed four Israelis before being shot dead in the city's bloodiest attack in years. AFP PHOTO / MAHMOUD ZAYYAT (Photo credit should read MAHMOUD ZAYYAT/AFP/Getty Images)
