** FILE ** In this Monday, March 18, 2013, file image taken from video obtained from the Shaam News Network, which has been authenticated based on its contents and other AP reporting, the free Syrian Army fighters fire at Syrian army soldiers during a fierce firefight in Daraa al-Balad, Syria. (AP Photo/Shaam News Network via AP video, File)

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** FILE ** In this Monday, March 18, 2013, file image taken from video obtained from the Shaam News Network, which has been authenticated based on its contents and other AP reporting, the free Syrian Army fighters fire at Syrian army soldiers during a fierce firefight in Daraa al-Balad, Syria. (AP Photo/Shaam News Network via AP video, File)