Tuesday, May 19 - A useful setback

The Mississippi River is lined with decades-old levees that sit right on the river bank. But some researchers say those levees are doing a poor job of preventing floods — especially as climate change makes historic flooding events more common and more severe. As St. Louis Public Radio’s Katie Grawitch reports, a new setback levee system near Spanish Lake is one of many getting a makeover that will help it guard against flooding.