Almost every day since the expansion of Canada’s Trans Mountain pipeline was completed in May, a tanker laden with oil sands crude shipped through the line has passed under Vancouver’s Lions Gate Bridge en route to refineries around the Pacific.

President Donald Trump’s sweeping tariffs on China, Canada and Mexico, have alarmed allies and spooked markets over fears of a global trade war.

Oil prices retreated on Tuesday after U.S. President Donald Trump agreed to hold off imposing steep tariffs on Mexico and Canada, the two biggest foreign oil suppliers to the United States, for a month.

The pauses—which allow a period of negotiations over drug trafficking and border security—provide a cool-down period after a tumultuous few days that put North America on the cusp of a trade war.