Wildfire smoke is making parts of the northeastern US look like Mars

• Wildfires in Canada are sending smoke to cities across the northeastern US. • Multiple states face air quality alerts as haze takes over the sky. • Photos from New York, Washington, DC, and other cities show how bad the haze is. Wildfires blazing across eastern Canada have sent plumes of smoke cascading hundreds of miles south into the US, transforming huge swaths of the Northeast into a Martian landscape with hazy, red skies. The US government has issued air quality warnings across the Midwest and Northeast, urging people to...