North Korea's nuclear test raises new concerns about its nuclear capabilities, regime succession, and the limits of both international pressure and engagement. Four experts address the policy options available to influence Pyongyang.

Scott A. Snyder discusses China and sanctions against North Korea.

Marcus Noland of Peterson Institute for International Economics says although the North Korean case will be taken up in the UN Security Council, UN sanctions have proven utterly ineffective in deterring North Korean behavior.

Brian P. Klein argues that North Korea's second nuclear test was provocative and that international reaction will likely be "swift and unforgiving."

William J. Perry,  Brent Scowcroft, and Charles D. Ferguson discuss an effective strategy to reduce the dangers of nuclear proliferation and nuclear terrorism.

President Barack Obama shouldn't respond too quickly, or too aggressively, to the North Korean nuclear test.

This DNI Open Source Center chart identifies the leadership hierarchy of the Democratic People's Republic of Korea.

Leslie Gelb argues, "the president's cool Korea strategy is wise."

CFR's Northeast Asia expert Sheila A. Smith says it is imperative for the United States to make it clear that it will not accept a nuclear North Korea. The UN's nonproliferation regime is also facing a moment of truth, she says.

Scott A. Snyder discusses North Korea's second nuclear test.

Scott A. Snyder analyzes what North Korea has said about prospects for renewed diplomacy with the United States.

Scott A. Snyder discusses the potential contradictions the Obama administration is facing as it develops its policy toward North Korea.

CFR's Scott A. Snyder says North Korea's recent moves away from the process to end its nuclear programs could arise from new developments on leadership succession and a desire to change the terms of engagement with Washington.

Scott A. Snyder discusses three developments that may indicate the administration's "policy-in-formation" toward North Korea.

This USIP working paper examines regime stability in North Korea in the framework of "North Korea, Inc." - the state's trading companies and their commericial interactions with South Korea.

In Comparative Connections, Scott A. Snyder and See-won Byun review recent developments in Korea-China relations.

Scott A. Snyder suggests benchmarks by which to judge the response of the United Nations and the Obama administration to North Korea's rocket test.

CFR's Sheila Smith says Pyongyang's latest attempt at a rocket launch shows the regime is clearly bent on acquiring a nuclear delivery capability. She says Washington must reassure North Korea that diplomacy is the only way forward.

Scott A. Snyder discusses the political targets of North Korea's missile test.