Air quality emergencies impact at least 21 states amid wildfires

Smoke and ash from wildfires in Canada settled over major cities and towns this week, including Minneapolis and New York. Health officials warned that coughing and shortness of breath are risks for everyone outside, especially those with chronic conditions. Tom Hanson reports.

Smoke and ash from wildfires in Canada settled over major cities and towns this week, including Minneapolis and New York. Health officials warned that coughing and shortness of breath are risks for everyone outside, especially those with chronic conditions. Tom Hanson reports.