POHANG, South Korea — Smoke billows from chimneys as factories churn in South Korea's steelmaking heartland, now under threat from Washington's swinging new tariffs on the port city's largest export.

The city of Pohang on South Korea's east coast for decades pumped out the steel that fuelled the country's breakneck economic rise. South Korea was the fourth largest exporter of the metal to the ...

POHANG, South Korea: Smoke billows from chimneys as factories churn in South Korea's steelmaking heartland, now under threat from Washington's swingeing new tariffs on the port city's largest export.