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Gen. McCaffrey: If Taliban obstruct evacuation, the U.S. will have to 'escalate militarily'

02:29

Retired Four Star General Barry McCaffrey said the U.S. is in a "perilous position militarily" as evacuations continue in Afghanistan. He said if the Taliban decides to obstruct the evacuation and take control of the airspace, the U.S. will have to "escalate militarily in a massive way".