The militant group Islamic State in Iraq and Syria released a video yesterday showing the execution of American journalist Steven Sotloff. U.S. intelligence officials confirmed the video’s authenticity early this morning. It’s the second beheading of a captured American journalist since the U.S. began airstrikes on Iraq on August 8th. In the video, a masked man with a British accent blames President Obama for what he calls an “arrogant foreign policy towards the Islamic State.” The White House announced yesterday it will send 350 additional troops to Iraq to protect diplomatic positions there. Diane and guests discuss the growing threat from ISIS and potential international response.