USS Michigan arrives in South Korea

The USS Michigan, a nuclear-powered Ohio-class guided-missile submarine made a scheduled stop in Busan, South Korea, on April 25.

At the same time a carrier strike force centered on the USS Carl Vinson is headed the same way.

Meanwhile, U.S. Navy ships are conducting exercises with South Korea and Japan Maritime Self Defense Force ships.

North Korea increased tension by staging a massive live-fire exercise, honoring the army’s 85th anniversary.

South Korea plans its own live-fire display later in the day.