Canadian wildfires blanket eastern U.S. with smoke, causing poor air quality for millions

Summary: Hundreds of wildfires continue to burn across Canada and many of them are out of control. The smoke is putting millions of Americans under air quality alerts, prompting warnings to stay indoors to avoid exposure to pollution. Stephanie Sy reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders