NEW : Department of Homeland Security , citing ISIS , calls for scrutiny of social media . Syria warns U.S. ` ` not to repeat the American actions in Iraq '' Al Qaeda - linked al - Nusra Front says its leader was killed in Iraq . The US also struck a new al Qaeda franchise in Syria called Khorasan Group .
NEW : Department of Homeland Security , citing ISIS , calls for scrutiny of social media . Syria warns U.S. `` not to repeat the American fiasco in Iraq '' Al Qaeda-linked al-Nusra Front says its leader was killed in airstrikes . The U.S. also struck a new al Qaeda franchise in Syria called Khorasan Group .