In this image made from amateur video released by the Ugarit News and accessed Monday, July 23, 2012, a Free Syrian Army soldier looks at a Syrian military that caught on fire during clashes with Syrian government troops in Aleppo, Syria. The Syrian regime acknowledged for the first time Monday that it possessed stockpiles of chemical and biological weapons and said it will only use them in case of a foreign attack and never internally against its own citizens. The Associated Press cannot independently verify the content, date, location or authenticity of this material. (AP Photo/Ugarit News via AP video)
**FILE** Smoke rises over the skyline July 19, 2012, in the Qaboun neighborhood of Damascus, Syria, during shelling by Syrian government forces. (Associated Press)
**FILE** Smoke rises over the skyline July 19, 2012, in the Qaboun neighborhood of Damascus, Syria, during shelling by Syrian government forces. (Associated Press)
This image made from amateur video released by the Ugarit News and accessed on Sunday, July 15, 2012, purports to show Free Syrian Army soldiers during clashes with Syrian government forces in Damascus, Syria. (AP Photo/Ugarit News via AP video)
This image made from amateur video released by the Ugarit News and accessed on Sunday, July 15, 2012, purports to show Free Syrian Army soldiers during clashes with Syrian government forces in Damascus, Syria. (AP Photo/Ugarit News via AP video)
This image made from amateur video from Hama Revolution 2011 and accessed by AP video on Friday, July 13, 2012, purports to show families gathered around bodies of victims killed by violence that, according to anti-regime activists, was carried out by Syrian government forces in Tremseh, Syria. (AP Photo/Hama Revolution 2011 via AP video)
This image made from amateur video from Hama Revolution 2011 and accessed by AP video on Friday, July 13, 2012, purports to show families gathered around bodies of victims killed by violence that, according to anti-regime activists, was carried out by Syrian government forces in Tremseh, Syria. (AP Photo/Hama Revolution 2011 via AP video)
This citizen journalism image provided by Shaam News Network taken Saturday purports to show the bodies of a man and a girl on the hood of a United Nations observer vehicle following a Syrian government assault on Houla, Syria. The Syrian government denied Sunday its troops were behind the attack in which at least 108 people were killed. (Shaam News Networks via Associated Press)
This citizen journalism image provided by Shaam News Network taken Saturday purports to show the bodies of a man and a girl on the hood of a United Nations observer vehicle following a Syrian government assault on Houla, Syria. The Syrian government denied Sunday its troops were behind the attack in which at least 108 people were killed. (Shaam News Networks via Associated Press)
