Smaller U.S. cities are also the most liveable in the country, according to this year's Global Liveability Index.

A wildfire smoke map shows the U.S. cities and states that are being the most impacted by the toxic plumes from the fires burning in Canada.

Air quality: Smoke, haze impact US air quality as Canadian wildfires continue to rage Grayling, Michigan wildfire: More than 3,000 acres burned; 85% contained Map: Smoke from wildfires in Canada ...

Air Canada announced a major U.S. expansion, unveiling four new destinations as it detailed 12 new routes between the USA and Canada. The new cities joining Air Canada’s route map are ...