This report discusses the issue of North Korea's inclusion on the U.S. list of terrorism-supporting countries that has been a major issue in U.S.-North Korean diplomacy since 2000, particularly in connection with negotiations over North Korea's nuclear program. North Korea demanded that the Clinton and Bush Administration remove North Korea from the terrorism support list. Secretary of State Clinton said on June 7, 2009, that the Obama Administration would consider reinstating North Korea on the list.

This report provides background information on the nuclear negotiations over North Korea's nuclear weapons program that began in the early 1990s under the Clinton Administration. It also provides information on other concerns that the U.S. has with North Korea, and discusses U.S. engagement activities with North Korea.

This report outlines the various elements of the bilateral relations between both the U.S. and North Korea and the U.S. and South Korea, especially nuclear nonproliferation agreements, nuclear dismantlement policies, and U.S. military troop withdrawals from South Korea.

This report describes the organizations controlling research and development (R&D) on nuclear weapons in several nations, and presents a brief history of the organizations controlling nuclear weapons R&D in the United States. It discusses whether these organizations are civilian or military, though in many nations the lines between civilian and military are blurred.

This report provides a brief survey of China-North Korea relations, assesses China's objectives and actions, and raises policy issues for the United States.

This report examines the economic side of U.S. leverage with North Korea and reviews U.S. policy and legislation. The security side of U.S.-DPRK relations is addressed in other CRS reports.