The relationship between China and the U.S. is off and running — and now the two countries are collaborating on secret, sensitive intelligence. Host Jane Perlez shares exclusive information about how Chinese and American intelligence officials agreed to work together against their common rival of many years. This is Part IV of The Great Wager from WBUR Podcasts and Here & Now. For more on the podcast and to join the conversation, go to our website: hereandnow.org/thegreatwager