SPORTNESS

The dispute over working conditions and hours is expected to cause widespread delays, stopping service on two lines.

Prime Minister Sanae Takaichi reversed limits on arms exports as Japan faces rising threats from China and unpredictability from its main ally, the United States.

The Asia-Pacific was hit hard and quick by the war in Iran and its energy bottlenecks. Scenes of crisis there indicate that problems are multiplying and spreading.

The U.S. remains an essential player. The problem, one analyst said, is how to deal effectively with a power that is “indispensable, coercive and unpredictable at the same time.”

Two of the victims were American and two were Mexican, the authorities in Chihuahua said. The accident took place on a treacherous mountain road.