The Russian and U.S. presidents signed a preliminary agreement on Monday to cut their countries' nuclear arsenals to 1,500-1,675 operational warheads within seven years after a new arms reduction treaty comes into force.

The abolition of nuclear devices is the ultimate medical issue and U.S. President Barack Obama needs the help of physicians around the world to do this, writes renowned author Dr. Helen Caldicott.

Attendance at talks by US Undersecretary of State William Burns marks policy shift for U.S. This is good for the world and we wish it to succeed.

U.S President George Bush holds a second day of talks with new South Korean President Lee Myung-bak Saturday at Camp David.

China is for the first time hosting talks on Iran's nuclear programs. China wants to show it is a responsible power while balancing its need for oil from Iran.

Major powers meeting in China to discuss the Iran nuclear issue, ended their latest round of talks without agreement on a new proposal aimed at re-starting stalled talks with Tehran.

Iranian state media are reporting that Iran is operating nearly 500 new uranium-enriching centrifuges at its Natanz nuclear facility.

Florida Power & Light Company, the principal subsidiary of FPL Group, Inc., will pay out $130,000 in civil penalties for breaching security requirements at the Turkey Point nuclear power plant.

The chief U.S. negotiator in six-nation talks on the North Korean nuclear crisis says talks with his North Korean counterpart in Singapore were good and may yield progress.

Iran's President Mahmoud Ahamadinejad announced on Tuesday that Iran is installing 6,000 new centrifuges at an uranium enrichment plant. The announcement drew sharp criticism from the United States and is expected to deepen the political rift between Iran and the West.

The Chinese government says it hopes the Iranian nuclear issue can be resolved through peaceful dialogue.

The top U.S. nuclear negotiator Christopher Hill has met with his North Korean counterpart in Singapore to end an impasse over talks aimed at ending North Korea's nuclear program.