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This citizen journalism image provided by Shaam News Network SNN, taken on Sunday, July 22, 2012, purports to show a Syrian man mourning as he prays during the funeral procession of Marwan Refaai Nasser in Homs, Syria. The Syrian regime threatened Monday, July 23, 2012 to use its chemical and biological weapons in case of a foreign attack, in its first ever acknowledgement that it possesses weapons of mass destruction. (AP Photo/Shaam News Network, SNN)THE ASSOCIATED PRESS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS CITIZEN JOURNALIST IMAGE

Associated Press
This citizen journalism image provided by Shaam News Network SNN, taken on Sunday, July 22, 2012, purports to show a Syrian man mourning as he prays during the funeral procession of Marwan Refaai Nasser in Homs, Syria. The Syrian regime threatened Monday, July 23, 2012 to use its chemical and biological weapons in case of a foreign attack, in its first ever acknowledgement that it possesses weapons of mass destruction. (AP Photo/Shaam News Network, SNN)THE ASSOCIATED PRESS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS CITIZEN JOURNALIST IMAGE
This citizen journalism image provided by Shaam News Network SNN, taken on Sunday, July 22, 2012, purports to show a Syrian man mourning as he prays during the funeral procession of Marwan Refaai Nasser in Homs, Syria. The Syrian regime threatened Monday, July 23, 2012 to use its chemical and biological weapons in case of a foreign attack, in its first ever acknowledgement that it possesses weapons of mass destruction. (AP Photo/Shaam News Network, SNN)THE ASSOCIATED PRESS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS CITIZEN JOURNALIST IMAGE
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