On CBS News, H.R. McMaster discusses the potential for boots on the ground in Iran and what phase two will look like now that the United States has established air dominance.
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A truck drives through the Alataw Pass Comprehensive Bonded Zone in northwest China’s Xinjiang Uygur Autonomous Region. Located in the Mongolian Autonomous Prefecture of Bortala in Xinjiang, the Alataw Pass borders Kazakhstan. (Getty Images)