El Salvador was once dubbed the “murder capital of the world,” causing many to flee north towards the United States. Now, many Salvadorans say they have never felt so safe, and some are even returning to the country after rebuilding their lives in the US. In this episode, we examine the controversial measures behind the turnaround.  Guest: David Culver, CNN Senior National Correspondent Learn more about your ad choices. Visit podcastchoices.com/adchoices