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. Learn more about your ad choices. Visit podcastchoices.com/adchoices