Retired Gen. David Petraeus warned the U.S. not to be complacent in protecting its place in the world order Wednesday. He's seen here in a photo from last summer.
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David Petraeus speaks in Los Angeles on Nov. 7, 2014. The former head of the U.S.-led coalition in Iraq tells The Washington Post that Iran and Shiite-backed militias pose a greater threat to Iraq than the self-described Islamic State.
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