The Panama Canal links the Atlantic and Pacific oceans. It sees hundreds of billions worth of stuff pass through it every year. But a historic drought is making it a little harder for big cargo ships to get through the fifty-one mile long channel. Today on the show, we look at how this backup) presents yet another test for global supply chains. **Related Episode: **Two Indicators: supply chain and solutions (Apple Podcasts) / Spotify)) *For sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org). Music by Drop Electric). Find us: TikTok), Instagram), Facebook), Newsletter). *Learn more about sponsor message choices: podcastchoices.com/adchoices)NPR Privacy Policy)