After disappearing from the radar for several decades, nukes are back, and modernizing the U.S. arsenal will almost certainly kick off a nuclear arms race.
U.S. and European leaders say Russia is becoming more "aggressive" lately; with NATO troops on its border, Moscow sees things differently.
The threat of a nuclear disaster has greatly increased since the collapse of the Soviet Union, top Russian and U.S. experts meeting in Washington agreed.
It is the most significant development between Washington and Tehran in more than three decades of estrangement between the two nations.
On June 30, 1985, 30 years ago today, Haruo Remeliik, the president of anti-nuclear Palau, had his brains blown out.
The U.S. and USSR agreed not to build defensive missile systems and thus to limit escalation of the nuclear arms race.
Peace, faith, environment and labor organizations are mobilizing for the Peace and Planet conference and march at the United Nations April 24-26.
While not seen as an environmental issue at the time, nuclear weapons pose the single biggest threat to the Earth's environment, scientists warned in 2006.
The global nuclear industry faces tough times - and activists feel optimistic - in light of historic news that Japan has decided to abandon nuclear power.
In Japan and around the world, tens of thousands are marking one of the worst atrocities in modern history, the only time atomic weapons were ever used against human populations. They are vowing to never let it happen again.