- USS Carl Vinson arrived at the southern port of Busan, in South Korea, to join the annual joint military exercise
- South Korea military source says heightened presence is part of plan to decapitate North Korean leadership
- Pyongyang has long condemned the annual joint drills - called Foal Eagle - between South Korea and the US
- Tensions have escalated with missile launches from North and assassination of Kim Jong-Un's half-brother
This year's exercise is expected to be of a similar scale.
The Carl Vinson Strike Group is participating in the annual joint Foal Eagle exercise between South Korea and the US