Contents: (1) North Korea¿s Nuclear Test and Withdrawal from the Six Party Talks: Bush Administration-North Korean Agreements and Failure of Implementation; Implementation Process; Verification Issue; Kim Jong-il¿s Stroke, and Political Changes Inside North Korea; Issues Facing the Obama Administration; (2) North Korea¿s Nuclear Programs: Plutonium Program; Highly Enriched Uranium Program; International Assistance; Nuclear Collaboration with Iran and Syria; North Korea¿s Delivery Systems; State of Nuclear Weapons Development; (3) Select Chronology; (4) For Additional Reading.