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.

Residents walk past buildings damaged during heavy fighting between Free Syrian Army fighters and government forces in Aleppo, Syria, on Sunday, Dec. 2, 2012. (AP Photo/Narciso Contreras)

Residents walk past buildings damaged during heavy fighting between Free Syrian Army fighters and government forces in Aleppo, Syria, on Sunday, Dec. 2, 2012. (AP Photo/Narciso Contreras)

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