South Korea will launch a rocket on the 11th, and the United States is worried about the situation on the peninsula.

North Korea and the United States signed the Geneva nuclear framework agreement, and the DPRK agreed to freeze its nuclear facilities. The United States took the lead in setting up the Korean Peninsula Energy Development Organization to build light water reactors and provide heavy oil for the DPRK to make up for the power loss caused by the DPRK’s cessation of its nuclear energy program.

When Bush became president of the United States, he listed North Korea as an "axis of evil" country and threatened to launch a "preemptive nuclear strike" against the DPRK.

After visiting Pyongyang, US Presidential Special Envoy Kelly announced that the DPRK had "acknowledged" its uranium enrichment program and accused it of developing nuclear weapons.

The United States suspended the supply of heavy oil to North Korea, and the Korean Peninsula Energy Development Organization suspended the construction of light water reactors.

North Korea announced its withdrawal from the Treaty on the Non-Proliferation of Nuclear Weapons.

China, North Korea, the United States, South Korea, Russia and Japan held six-party talks in Beijing.

The fourth round of six-party talks reached a joint statement: the DPRK promised to abandon all nuclear weapons and existing nuclear programs and return to the Treaty on the Non-Proliferation of Nuclear Weapons at an early date; The United States confirms that it has no nuclear weapons on the Korean peninsula and has no intention of attacking or invading North Korea with nuclear or conventional weapons.

North Korea announced a successful underground nuclear test.

After the first batch of 6,200 tons of heavy oil transported by South Korea arrived at Pioneer Port in North Korea, the DPRK closed Yongbyon nuclear facility.

The document of the sixth round of six-party talks: North Korea should complete the disablement of Yongbyon nuclear facilities and fully declare its nuclear program before the end of 2007; The United States acted according to the DPRK and fulfilled its commitment to the DPRK.

Due to differences between the two sides on the declaration, North Korea missed the original deadline for declaring its nuclear program.

North Korea submitted more than 18,000 pages of documents on North Korea’s nuclear program to Kim Sung, head of the Korean Section in the State Council, USA, who arrived in Pyongyang on the same day. The U.S. government called the move an "important step" in verifying North Korea’s nuclear program.

North Korea bombed Yongbyon nuclear facility

North Korea announced that it would restart its nuclear program and withdraw from the six-party talks.

North Korea conducted its second underground nuclear test.