Inside Chicago's battle against the synthetic drugs flooding the US

A new wave of synthetic drugs is sweeping across the United States, raising fear of a worsening drug crisis. The BBC's Quentin Sommerville reports from the frontlines in South Side, Chicago, where communities are battling the crisis.

A new wave of synthetic drugs is sweeping across the United States, raising fear of a worsening drug crisis. The BBC's Quentin Sommerville reports from the frontlines in South Side, Chicago, where communities are battling the crisis.