A Republic of Korea soldier stands guard as USS Nimitz arrives for a port visit at Busan Naval Base, Feb. 28. The nuclear-powered aircraft carrier is taking part in Exercise Key Resolve/Foal Eagle 2008, an annual combined/joint exercise involving forces from both the U.S. and the ROK. This exercise provides training to further enhance interoperability and combat readiness, while also demonstrating both countries' commitment to the ROK/US alliance.