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Gen. McCaffrey: If Iran responds with a successful attack on U.S. interests, the Persian Gulf War will 'begin anew'


Retired Four-Star Army General Barry McCaffrey joins Andrea Mitchell, warning of the Iranian ability to retaliate against the U.S. He tells Andrea that 'The Iranians have a tactical advantage on the ground,' and that the deployment of one brigade of the 82nd Airborne is 'not even remotely capable of defending our position in Iraq.'