South Korea's top security adviser will travel to the United States this week for talks on North Korea and other bilateral issues.
During his four-day trip starting Wednesday, presidential national security office chief Kim Jang-soo will meet U.S. National Security Adviser Susan Rice, where North Korea's nuclear issue is to top the agenda. The talks come as Pyongyang has restarted a reactor at its Yongbyon nuclear facility.
The two sides will also discuss the possibility of delaying Washington's transfer of wartime operational control to Seoul, which is due to occur in 2015. Another item on the agenda will be Seoul's own missile defense development.