Higher tariffs take effect today on imports from many U.S. trading partners. The import taxes are raising tens of billions of dollars for the government, but also beginning to weigh on the U.S.

NPR's Steve Inskeep asks economist Paul Krugman what effect President Trump's latest tariff announcements might have on the economy.

Canada is having its second worst wildfire season yet. Two scientists explain what a red air alert means and how anyone living in impacted areas can protect themselves.