From this winning NYT article yesterday:
"Reports that Iran has sent its paramilitary Quds Force to help the struggling Iraqi Army battle the militant group, the Islamic State of Iraq and Syria, raised the awkward possibility that the United States could find itself allied with Iran in shoring up an unpopular Shiite government in Baghdad."Nothing like a common enemy to unite the forces of good1!
Oh, and I've been slow on the inevitable ISIS puns, but don't you worry; they're coming.
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