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.

The Carl Vinson Carrier Strike Group arrived in South Korea only days after Pyongyang carried out its fourth missile test this year.

The presence of a U.S. aircraft carrier in South Korea this week highlights the strengthening bilateral alliance, a U.S. admiral said Monday, a day after its arrival in the southeastern city of Busan.