The relationship between China and the U.S. is off and running — and now the two countries are collaborating on secret, sensitive intelligence. The fourth part of Here & Now's "The Great Wager" includes exclusive information about how Chinese and American intelligence officials agreed to work together against their common rival of many years.  About: Stare down the barrel of America’s most controversial, protected and lethal industry: guns. Find out how America was forged by the gun industry on this new podcast series from WBUR & The Trace, The Gun Machine. You're listening to The Gun Machine in Short Run — the best long-form audio series from WBUR, Boston's NPR, all in one feed. We’d appreciate your help to better understand The Gun Machine's listeners and get feedback on the podcast — it’ll take you about 10 minutes or less! Take our survey here: https://www.surveymonkey.com/r/thegunmachine