Obama gives stern warning to Assad about chemical weapons

President Obama on Monday issued a stern warning to Syrian leader Bashar Assad not to use chemical weapons against his own citizens.

In this citizen journalist image, which has been authenticated based on its contents and other AP reporting, anti-Syrian-regime mourners carry the coffins of Syrian civilians who were killed by the shelling of forces loyal to Syrian President Bashar Assad, in Homs, Syria, on Monday, Dec. 3, 2012. (AP Photo/Lens Yong Homsi)

In this citizen journalist image, which has been authenticated based on its contents and other AP reporting, anti-Syrian-regime mourners carry the coffins of Syrian civilians who were killed by the shelling of forces loyal to Syrian President Bashar Assad, in Homs, Syria, on Monday, Dec. 3, 2012. (AP Photo/Lens Yong Homsi)

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