A blockade of the bridge between Canada and Detroit by protesters demanding an end to Canada’s COVID-19 restrictions forced the shutdown Wednesday of a Ford plant and began to have broader implications for the auto industry.

People throughout the Canadian province of Ontario awoke Sunday to a cellphone alert warning them of an “incident” at a nuclear plant just east of Toronto — only to later be told the message was a mistake. The message, which was transmitted throughout the nation’s most populous province, was accompanied by a shrill emergency broadcast noise. It said an unspecified…

The worst had passed, it seemed, and the United States and Iran no longer appeared poised at the edge of war.

A Chinese court sentenced a Canadian man to death on Monday in a sudden retrial of a drug smuggling case and Beijing said that it has denied a Canadian diplomatic immunity, ratcheting up tensions since Canada’s arrest of a top Chinese technology executive last month. A Chinese court in northeastern Liaoning province announced that it had given Robert Lloyd Schellenberg...