Recode Decode: Ash Carter, United States Secretary of Defense

U.S. Secretary of Defense Ash Carter talks with Kara Swisher about his efforts to unite the Pentagon and Silicon Valley behind common goals, including a new "innovation advisory board" chaired by Eric Schmidt. He also explains why he is a strong supporter of encryption, why he almost never uses a cell phone and why he does not want to cede control of the Internet to countries like China and Russia.

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