In the bestselling new book "The Hundred-Year Marathon," author and former Pentagon official Michael Pillsbury argues that China is angling to replace the United States as a global superpower. Chief foreign affairs correspondent Margaret Warner interviews Pillsbury about what he thinks the U.S. can do to counteract the “secret strategy.”

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The P4 laboratory, on the campus of the Wuhan Institute of Virology, in Wuhan, in China's central Hubei province. (Hector Retamal/AFP via Getty Images)