Nuclear | featured news

Iran is experiencing surprising setbacks in its efforts to enrich uranium, according to new assessments that suggest equipment failures could undermine its nuclear ambitions.

Iran said it has begun enriching some of its low-grade uranium for use in a medical-research reactor, brushing off fresh international threats of economic sanctions.

Mahmoud Ahmadinejad tells his atomic energy chief to boost uranium enrichment from 3.5% to 20% as talks over a nuclear-fuel exchange sputter.

Iran announced the test-firing of a powerful rocket loaded with several live animals into space and unveiled a handful of other space technologies Wednesday, ahead of a nationalist holiday and amid heightened international concerns about Tehran's nuclear research and missile programs.

South Korea's defense chief called Wednesday for a pre-emptive strike on North Korea if there is a clear indication the country is preparing a nuclear attack....

Iran said on Monday it would take revenge on its arch-foes Israel and the United States for the killing of an Iranian scientist last week, media reported.

South Korea and the U.S. rejected North Korea's proposal to start peace talks to formally end the Korean War, with Seoul saying Tuesday that can happen only after the North rejoins disarmament talks and reports progress in denuclearization.

Mordechai Vanunu is suspected of violating parole by meeting with foreigners. He spent 18 years in prison after leaking information on an Israeli nuclear plant.

A Korean-led consortium won a landmark contract, valued at around $20.4 billion, to build four nuclear reactors in the U.A.E., in what officials in this Persian Gulf country have said is the region's largest-ever energy deal.

The missile could easily reach Israel. Coupled with suspicions about Tehran's nuclear program, it stokes international concerns.