Wolf Blitzer delivers the most important breaking news and political, international, and national security stories of the day. Tune to The Situation Room weekdays 5-7pm ET on CNN.
As the world's most brutal terror group rampages across Iraq, seizing more cities along the way, the U.S. weighs what options it has to stop the violent spree and prevent the Islamic State of Iraq and Syria from establishing its own territory. CNN's Barbara Starr looks at the options.
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