The U.S. aircraft carrier USS Carl Vinson arrived at the southern port city of Busan in South Korea on Sunday as a show of force against North Korea, South Korea's navy said. It is the first U.S. aircraft carrier to dock at a South Korean port since U.

North Korea condemned an upcoming U.S.-South Korea joint military exercise Friday, saying that "counteraction is inevitable" and warning that the allies would "pay dearly."

A visit by a U.S. aircraft carrier to South Korea prompted a warning from the sister of North Korea’s leader that Washington and Seoul “should not test” the communist regime.