The Bush administration flipped its long-standing policy toward North Korea as Washington envoy Christopher Hill arrived for talks in Pyongyang.

A new IAEA report suggests Iran has made significant progress with its nuclear program, surprising some experts and prompting U.S. officials to call for further sanctions.

U.S. officials say a proposed missile defense shield is not aimed at Russia but the Kremlin disagrees, suspending participation in a conventional arms treaty.

Iran now says it will attend a conference on Iraqi security and has shown a willingness to negotiate on its nuclear program amid growing pressure.

After delays hampered the release of North Korean funds from a Macao bank, Pyongyang failed to meet a deadline to close a nuclear facility.

Iran now says it has industrial-scale enrichment capabilities, a claim that faces skepticism, but if true, may jeopardize talks with the UN Security Council and further isolate Tehran.

Six-Party Talks stall, despite a U.S. policy shift involving the release of frozen North Korean funds from a bank in Macao.

A second round of UN sanctions is expected against Iran, including a possible arms embargo. Yet experts disagree whether more sanctions will make Tehran buckle.

Efforts to normalize U.S.-North Korea relations are underway as questions surround 2002 intelligence on Pyongyang’s uranium enrichment program.

An IAEA report affirms Iran is defying another nuclear deadline set by the Security Council but it is unclear what punitive measures will follow.

Officials at the Six-Party Talks in Beijing announced a tentative deal to curb North Korea’s nuclear program. But experts warn the history of such "breakthroughs" warrants caution.

Washington recently sat down for talks with Pyongyang in Berlin and Six-Party Talks are set to resume in early February.

Amid reports Tehran may soften its nuclear stance, Washington has squeezed Iran to signal it will not allow the country to dominate the region.

The passage of UN sanctions marks the latest of several recent setbacks for Tehran, reflecting concern abroad about its nuclear program and internally about the government’s ability to cope with social and economic demands.

Pyongyang agreed to rejoin Six-Party Talks on its nuclear program a year after walking away from negotiations. But the meetings, which resumed in Beijing this week, hold little hope of stopping a now-nuclear North Korea.

Congressional approval of a U.S.-India nuclear deal will bring energy-starved India another step closer to securing nuclear fuel and technology for its civilian program.

Iran vows to complete its uranium-enrichment program, refusing to give in to demands by the world's chief atomic watchdog to demonstrate its program is for peaceful purposes.

China played the lead role in bringing North Korea back to nuclear weapons talks. But where do negotiations go from here? 

With Iran closely watching events on the Korean peninsula, the aftermath of Pyongyang’s nuclear test may only embolden Tehran’s hard-liners.

China, whose relations with North Korea have grown strained in recent weeks, is putting pressure on Pyongyang to return to the Six-Party Talks.