Men try to put out a fire in Maaret al-Naaman, Syria, at a site hit by what activists said was an airstrike by forces loyal to Syria's President Bashar al-Assad June 22, 2014.
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A Free Syrian Army fighter looks out of a damaged building on the frontline of Aleppo's Al-Ezaa neighborhood, June 15, 2014.
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Syrians who live in Iran line up to vote for their country's presidential election at the Syrian Embassy in Tehran, Iran, May 28, 2014, as expat voting started ahead of Syria's June 3 presidential election - a vote highly contentious amid the civil war but one that is widely expected to give the Syrian president a third seven-year term in office.
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Akram Sweidan decorates on a missile shell in the Duma neighborhood of Damascus, Syria, May 27, 2014.
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A man holds a wounded child at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood on May 28, 2014.
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People stand near damaged buildings along a street at a site hit by what activists said was a barrel bomb dropped by forces loyal to Syria's President Bashar al-Assad in Aleppo's Bustan al-Qasr neighborhood on May 28, 2014.
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Children play in the Sheikh Maksoud area of Aleppo on May 14, 2014.
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A man takes a photo of his friend in front of a poster of President Bashar al-Assad in Damascus on May 16, 2014. Syria is holding a presidential election June 3, preparing the ground for Assad to defy widespread opposition and extend his grip on power. Opponents have dismissed the vote as a farce.
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Children fill containers with water during a water shortage in the old city of Aleppo on April 6, 2014.
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Men rescue a boy from under the rubble of a building damaged by what activists said were explosive barrels dropped by forces loyal to Syria's President Bashar al-Assad in the Al-Shaar neighborhood of Aleppo on April 6, 2014.
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Courtesy of SANA/Reuters
Forces loyal to President Bashar al-Assad carry pictures of him and his late father, former Syrian president Hafez al-Assad, as they commemorate the 67th anniversary of the founding of the Baath party at an undisclosed location in this photograph distributed on April 7, 2014. The Baath Party has ruled Syria since 1963.
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A crew member of the Danish warship Esbern Snare wears a protective mask which reflects the Danish cargo ship Ark Futura, Jan. 5, 2014. Two cargo ships and their warship escorts await orders to pick up more than 1,000 tons of chemical agents for disposal at the Syrian port of Latakia.
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Aleppo Media Center/AP
Syrians inspect the rubble of damaged buildings following a Syrian government airstrike in Aleppo, Syria, Dec. 17, 2013. A burst of strength by Al Qaeda that is chipping away at the remains of Mideast stability. Photo authenticated based on its contents and other AP reporting,
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Dust covers clothes at a site hit by what activists said was an airstrike by forces loyal to Syrian President Bashar al-Assad in the Duma neighborhood of Damascus, January 7, 2014.
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Fighters from the Islamic State in Iraq and the Levant (ISIL) try to calm civilians demonstrating against the rebel infighting in Aleppo, January 6, 2014. Syrian rebel factions battled fighters from the ISIL across northern and eastern Syria. The apparently coordinated strikes against the ISIL come after months of increasing resentment of the powerful Al Qaeda-linked group, whose radical foreign jihadis have alienated many ordinary Syrians in rebel-held territory.
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Residents ride bicycles though a street in Eastern Ghouta in Damascus, January 3, 2014.
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Syrian President Bashar al-Assad (center l.) meets with Australian professor Tim Anderson (center r.) and a delegation including academics, researchers, and activists in Damascus, Dec. 23, 2013.
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Farmers carry wheat bags before planting in eastern al-Ghouta, near Damascus, December 26, 2013.
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Spanish UN peacekeepers patrol the Lebanese Israeli border in the southern village of Odaisa, Lebanon, Aug. 29, 2013. There are concerns that US military action in Syria would trigger cross border retaliation by the Lebanese militant Hezbollah against Israel.
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A Hezbollah supporter waves the flags of Hezbollah, Bahrain and Syria, during a rally marking the seventh anniversary of the 2006 Israel-Hezbollah war, at the southern Lebanese-Israel border village of Aita, Lebanon, Aug. 16, 2013.
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A Shiite Iranian man kisses the Saint Ali Akbar shrine, in northern Tehran, Iran, June 23, 2013. Hatreds between Shiites and Sunnis are now more virulent than ever in the Arab world because of Syria's brutal civil war. Hard-line clerics and politicians on both sides have added fuel, depicting the fight as essentially a war of survival for their sect.
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Survivors from what activists say is a gas attack are seen along a street in the Duma neighborhood of Damascus August 21, 2013. Syrian activists accused President Bashar al-Assad's forces of launching a gas attack that killed more than 200 people in what would, if confirmed, be by far the worst reported use of chemical arms in the two-year-old civil war. Syrian state television denied government forces had used poison gas.
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Lebanese citizens and a Red Cross worker, (r.) try to extinguish burned shops at the site of a car bomb explosion in southern Beirut, Lebanon, Aug. 15, 2013. The powerful bomb ripped through a crowded neighborhood that is a stronghold of the militant group Hezbollah. It killed at least a dozen people in the latest violence linked to the civil war in neighboring Syria, officials said.
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Fighters from Iraq's Islamist Shi'ite militias celebrate before departing to Syria from Baghdad, June 11, 2013. Syria is splintering the Middle East between the two main denominations of Islam. Sectarian killings are increasing, wIth hardline Sunni clerics declaring a holy war on the Shi'ites of Syria, Iraq and Lebanon. This is inciting Shi'ite militants to fight back.
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Syrian Presidency via Instagram/AP
This undated photo posted on the official Instagram account of the Syrian Presidency purports to show Bashar al-Assad visiting with soldiers in Baba Armr, Homs province, Syria, in 2012. Amid the carnage from the Syrian civil war, President al-Assad has embraced every tool at his disposal including social media to project confidence and transmit his message to dedicated fans.
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Hezbollah supporters clash with supporters of the Lebanese Option Party during a protest in front of the Iranian Embassy in Beirut, Lebanon, June 9, 2013. A senior Lebanese military official says clashes have erupted outside the Iranian embassy between protesters opposing Hezbollah's participation in the Syrian war and unidentified Lebanese, killing one demonstrator.
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A Free Syrian Army fighter takes up a shooting position at the Seif El Dawla front in Aleppo, August 4, 2013.
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Members and supporters of Intima party, lay roses on a Lebanese national flag, during a demonstration in front of the Iranian embassy in Beirut June 23, 2013. The demonstrators were condemning what they say is Iranian and Hezbollah backing for the Syrian president in a civil war that has been spreading across Lebanon's border.
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A girl holds a gun across her lap, as she sits with a Free Syrian Army fighter along a street in Aleppo, August 1, 2013.
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A Palestinian protester holds pictures of Syria's President Bashar al-Assad (r.) and Hezbollah leader Sayyed Hassan Nasrallah during a demonstration against potential strikes on the Syrian government, in the West Bank City of Ramallah, August 31, 2013.
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An Israeli soldier from the Golani Brigade sleeps as others, seen through a black netting, pray close to the ceasefire line between Israel and Syria on the Israeli occupied Golan Heights on May 7, 2013. Israel has not acknowledged involvement in the strikes on Syria.
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An Israeli soldier is seen next to an Iron Dome rocket interceptor battery deployed near the northern Israeli city of Haifa, Aug. 28, 2013. Israel ordered a special call-up of reserve troops as nervous citizens lined up at gas-mask distribution centers, preparing for possible hostilities with Syria.
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Members of the Free Syrian use a video camera to record the scene outside, in the old city of Aleppo June 19, 2013.
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Israeli soldiers take part in an urban warfare drill simulating a battle with Hezbollah in a mock village at Elyakim military base near the northern city of Haifa July 11, 2013. Israel is worried Hezbollah is making initial preparations for future confrontation with it on a new front with Syria and is accruing valuable combat experience on the Syrian battlefield.
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Children walk past tents of a Syrian refugees camp in Yayladagi, Turkey, Sept. 3, 2013. The civil war in Syria has forced over 2 million people out of the country and over 4 million others are displaced within its borders, making Syrians the nation with the largest number of people torn from their homes, UN officials said.
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Israelis line up at a gas mask distribution center in Tel Aviv, Israel, Aug. 28, 2013. Large crowds of Israelis have lined up at gas-mask distribution centers across the country in anticipation of a possible Syrian attack on Israel.
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Taymaa Shteiwi is cradled by a relative on July 24, 2013, at Zaatari Syrian refugee camp in Mafraq, Jordan, near the border with Syria.
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United Nations chemical weapons experts, escorted by Free Syrian Army fighters, visit one of the sites of an alleged chemical weapons attack in Damascus' suburbs of Zamalka August 28, 2013. UN chemical weapons experts investigating an apparent gas attack that killed hundreds of civilians in rebel-held suburbs of Damascus made a second trip across the front line to take samples.
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Abu Suleiman, leader of an Islamist rebel group in Aleppo called 'The Authority for the Promotion of Virtue and Supporting the Oppressed,' leads the prayers in Aleppo February 25, 2013. The group is a member of the Islamic Front for the Liberation of Syria and says it is handing out aid and carrying out civilian administration in parts of Aleppo and its rural areas.
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A fighter from the Sadik unit of Free Syrian Army's Tahrir al Sham brigade fires an Austrian Steyr AUG rifle from inside a house during heavy fighting in Mleha suburb of Damascus, January 22, 2013. Rebels have so far relied mainly on light weapons smuggled from neighboring countries. A Reuters photographer in Damascus over the last month saw several Western-built rebel firearms that almost certainly came from outside the country.
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Syrian rebels attend a training session in Maaret Ikhwan, near Idlib, Syria, Dec. 17, 2012.
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Scott Peterson/Getty Images
Anti-government Syrian media activists set up an illegal internet satellite to upload photos and video of the destruction by government shelling and bombardment of areas controlled by the rebel Free Syrian Army (FSA) in Aleppo, Syria, on Oct. 22, 2012. In this critical battleground of Syria's 20-month uprising, FSA commanders say they control more than half of Syria's second city and commercial hub, though civilian areas and especially long bread lines have been targeted daily.
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Residents greet each other in front of their damaged houses in the Damascus suburb of Douma April 16, 2013.
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Scott Peterson/Getty Images
A wounded Syrian girl is brought to hospital as the intense human and material cost grows from three months of intense fighting against rebels of the Free Syrian Army (FSA) in Aleppo, on Oct. 24, 2012.
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Members of the Free Syrian Army work on an improvised mortar shell in Deir al-Zor March 8, 2013.
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Syrian President Bashar Assad (c. top) greets lawmakers before his speech at the Parliament in Damascus, Syria, March 30, 2011.