A US Navy aircraft carrier has arrived in South Korea just days after Russia and North Korea signed a defense pact

• A US aircraft carrier has arrived in South Korea for military exercises.
• Its arrival comes days after Russia and North Korea agreed to an unprecedented defense pact.
• The carrier group sends a message to Russia and North Korea and projects US power in the region.

A US Navy aircraft carrier has arrived in South Korea at an opportune moment.

The USS Theodore Roosevelt Carrier Strike Group arrived in Busan on Saturday, days after Russian President Vladimir Putin and North Korean leader Kim Jong Un agreed to a defense pact during a high-profile summit in Pyongyang.