Obama calls the beheading of U.S. aid worker Peter Kassig "an act of pure evil".
U.S. Secretary of State John Kerry traveled to Indonesia on Monday to visit with President Joko Widodo and urge him to take more action against the Islamic State.
Even with accurate air strikes and Kurdish fighters battling against IS jihadists, the Pentagon warns that there will be "no quick and easy end to the fighting."
In Baghdad, actors and artists are battling back against IS with a comedy TV show.
Islamic State militants release a message in response to the air raids launched on Syria.
Jihadists linked to the Islamic State group beheaded a Frenchman that was abducted from a national park in Algeria after Paris ignored their demand to cease air strikes.
Overnight raids by the U.S.-led coalition targeted Islamic State (IS) fighters in the area of a Kurdish town in Syria.