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.

Syrian rebel fighters stand on a tank they took after storming a military base in Aleppo, Syria, on Monday, Nov. 19, 2012. (AP Photo/Khalil Hamra)

Syrian rebel fighters stand on a tank they took after storming a military base in Aleppo, Syria, on Monday, Nov. 19, 2012. (AP Photo/Khalil Hamra)

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