The premier of Canada’s most populous says he will cut off energy to the United States if President-elect Donald Trump imposed sweeping tariffs on all Canadian products.

COVID-19 vaccines still offer strong protection against severe illness and death, but Moderna and Pfizer are testing combination shots as a possible new kind of booster.

Johnson & Johnson’s COVID-19 vaccine will remain in limbo for a while longer.

FILE - Ken Burns, director of the PBS documentary series "Country Music," takes part in a panel discussion during the Television Critics Association Summer Press Tour on July 29, 2019, in Beverly Hills, Calif. Speaking Monday, Feb. 1, 2021, to the Television Critics Association in a virtual Q&A, PBS chief executive Paula Kerger rejected a filmmakers claim that public TVs long relationship with Burns has come at the expense of diversity. (Photo by Chris Pizzello/Invision/AP, File)LOS ANGELES – The chief executive of PBS rejected a filmmaker’s argument that public TV's 40-year relationship with documentarian Ken Burns has come at the expense of diversity. “We create lots of opportunities for many filmmakers,” Kerger said. "The stuff that’s coming up is incredibly diverse in every sense of the meaning of that word,” Burns said.