Bashar Ja'afari, Syria's U.N. ambassador, speaks during a news conference at United Nations headquarters Tuesday, April 30, 2013. Ja'afari says the use of chemical weapons is not only "a red line" but... more 
Bashar Ja'afari, Syria's U.N. ambassador, speaks during a news conference at United Nations headquarters Tuesday, April 30, 2013. Ja'afari says the use of chemical weapons is not only "a red line" but "a blood line" that cannot be tolerated and is again demanding a U.N. investigation of an alleged chemical weapons attack in Aleppo that his government blames on rebels. (AP Photo/Mary Altaffer) less 
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Associated Press | Photo By Mary Altaffer
Tue, Apr 30, 2013 5:38 PM EDT