This CRS report discusses relations between Koran and the United State. "The United States has had a military alliance with South Korea and important interests in the Korean peninsula since the Korean War of 1950-53. Many U.S. interests relate to communist North Korea. Since the early 1990s, the issue of North Korea's development of nuclear weapons has been the dominant U.S. policy concern. Experts in and out of the U.S. government believe that North Korea has produced at least six atomic bombs, and North Korea tested a nuclear device in October 2006. Negotiations over the nuclear issue have been underway since 2003. In 2007, a six party negotiation (between the United States, North Korea, China, South Korea, Japan, and Russia) produced agreements encompassing two North Korean and two U.S. obligations: disablement of North Korea's Yongbyon nuclear installations, a North Korean declaration of nuclear programs, U.S. removal of North Korea from the U.S. list of state sponsors of terrorism, and U.S. removal of North Korea from the sanctions provisions of the U.S. Trading with the Enemy Act. By April 2008, progress had been made on the disablement, and a U.S.-North Korea agreement reportedly negotiated at Singapore sets the format and content of a declaration and secret side agreement. The Bush Administration has subordinated to the nuclear issue a number of other North Korean activities that affect U.S. interests. North Korean exports of counterfeit U.S. currency and U.S. products produce upwards of $1 billion annually for the North Korean regime. North Korea earns considerable income from sales of missiles and missile technology cooperation with countries like Iran and Syria. It has developed short-range and intermediate range missiles, but it has failed to develop an intercontinental ballistic missile."
CRS Report for Congress, RL33567