A member of the 'Ansar Dimachk' Brigade, part of the Asood Allah Brigade which operates under the Free Syrian Army, uses an iPad during preparations to fire a homemade mortar at one of the battlefronts in Joubar, a suburb of Damascus, Syria, on September 15, 2013. #

An archway on a road leading to Syria's ancient Christian town of Maalula, as fighting continues between government forces and rebel fighters, on September 18, 2013. The town lies around 55 kilometers (34 miles) north-east of Damascus and is strategically important for the rebels, who are trying to tighten their grip on the capital. #

Smoke rises as a result of shelling from forces loyal to President Bashar al-Assad, according to activists, in Ariha countryside, on September 7, 2013. Ariha, which was previously controlled by the Free Syrian Army, is witnessing ongoing clashes after it was wrested control by forces loyal to Assad due to its importance as part of a supply route from the coastal area of Latakia to Aleppo, activists said. #

A Syrian soldier is captured by Free Syrian Army fighters during what the FSA say is an offensive against forces loyal to Bashar al-Assad, in Qobtan village in Aleppo, on August 22, 2013. #

This citizen journalism image provided by The Syrian Revolution against Bashar Assad which has been authenticated based on its contents and other AP reporting, shows a Syrian military tank on fire during clashes with Free Syrian army fighters in Joubar, a suburb of Damascus, on September 18, 2013. #

An image grab taken from a video shows an opposition fighter firing a rocket propelled grenade (RPG) on August 26, 2013 during clashes with regime forces over the strategic area of Khanasser, situated on the only road linking Aleppo to central Syria. Rebels had in recent days captured several villages in Aleppo province, much of which is already in the hands of anti-regime fighters, before taking Khanasser, situated on the highway to Hama in central Syria, thus cutting the army's only supply route to the northern province. #

A tank is reflected in the sunglasses of a rebel fighter during a ceremony to mark an agreement to unite the of forces Liwaa al-Tawid and Liwad al- Fatah brigades on September 13, 2013 at a former military academy north of Aleppo. #

Issa, 10 years old, carries a mortar shell in a weapons factory of the Free Syrian Army in Aleppo, on September 7, 2013. Issa works with his father in the factory for ten hours every day except on Fridays. #

In this September 11, 2013 photo released by the Syrian official news agency SANA, a journalist records a Syrian government solider as he aims his weapon, during clashes with Free Syrian Army fighters in Maaloula village, northeast of the capital Damascus. Heavy fighting between Syrian government troops and rebels flared again in the ancient, predominantly Christian village of Maaloula. Troops are trying to flush out rebel units, including two that are linked to al-Qaida, from the hilltop enclave which they broke into last week. #

Syrian soldiers flashes the V-sign for victory as he poses in a Russian-made Syrian army armored personnel carrier stationed along a street leading into Maalula, Syria, scene of fighting between pro-government troops and rebel forces on September 18, 2013. The town lies around 55 kilometers (34 miles) from Damascus and is strategically important for rebels, who are trying to tighten their grip on Damascus. Maalula is one of the most renowned Christians towns in Syria, where many of its inhabitants speak Aramaic, the language of Jesus. #

Heavily damaged buildings in the Salah al-Din area of Aleppo, on September 8, 2013. The sheets and bus provide limited cover from sniper fire for those wishing to cross the street. #

Free Syrian Army (FSA) fighters carry weapons as they take up positions during an offensive against forces loyal to Bashar al-Assad in Aleppo's town of Khanasir, on August 26, 2013. The smoke is pouring out of the cultural center of the town after the Free Syrian Army set it on fire. #

A dead body lies on the ground, covered with a blanket, after what activists said was shelling by forces loyal to Syria's President Bashar al-Assad in the al-Myassar neighborhood of Aleppo, on September 18, 2013. #

A member of the Liwaa Ahrar Suriya brigade, operating under the Free Syrian Army, takes up position in a public park that separates them from forces loyal to President Bashar al-Assad in the Sakhour area of Aleppo, on August 24, 2013. #

A Syrian girl walks on the roof of a house, as opposition fighters prepare themselves for combat in the village of Kafr Nabuda, Idlib province, on September 19, 2013. #

A handout image released by the Syrian opposition's Shaam News Network on September 19, 2013 shows Syrian rebels mourning fallen comrades in the central Syrian province of Hama. #

Young Syrian-Kurdish women take part in a training session organized by the Kurdish Women's Defense Units (YPJ) on August 28, 2013, in the northern Syrian border village of al Qamishli, to prepare them to defend their villages if they come under attack. #

A fighter of the Popular Front for the Liberation of Palestine General Command (PFLP-GC) aims his rifle as he squats on the windowsill of a destroyed building in the Yarmouk refugee camp in Damascus, on September 12, 2013, following fighting against rebel forces who control 75 percent of the camp. The PFLP-GC has been allied to Syrian President Bashar al-Assad's government whose troops have been fighting rebel forces for the past two years. #

Mustafa Abu Bekir, 23, an FSA fighter who said he lost his legs during a bombing by the Syrian Air Force, is welcomed by a relative as he is carried by a family member just after they entered Turkey from the Turkish Cilvegozu border gate, located opposite the Syrian commercial crossing point of Bab al-Hawa, in Hatay province, on September 9, 2013. #

A boy dives into a crater filled with water in Deir al-Zor, on September 4, 2013. The crater was caused by what activists said was shelling by forces loyal to the Syrian government. #