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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A US flag flies off the stern of a tour boat at the Port of Los Angele in California on July 31, 2025. (Getty Images)