The death of the last treaty between Russia and the U.S. that limited the size of nuclear arsenals may spark a new arms race, ...

The New START treaty, which limits nuclear weapons, is due to expire in February.

On February 5, a treaty capping the numbers of deployed Russian and US nuclear warheads will expire, marking the first time in more than half a century that the two countries' nuclear programs will be ...

The US military was spotted testing a new stealth nuclear weapon on a Cold War bomber last week — just as the Air Force was preparing to test its Minuteman III Intercontinental Ballistic Missile An ...

The world passed a nuclear milestone this week. And, perhaps surprisingly given the recent run of saber-rattling from the likes of Russia and the United States, it’s a positive one.

European powers are examining how to their bolster nuclear arsenals to guard against Russia amid questions about America’s commitment to NATO.

South Korean President Lee Jae Myung said Wednesday that North Korea is producing enough nuclear fissile material to build ...

North Korea is producing enough nuclear material a year for up to 20 weapons, the South's President Lee Jae Myung said on ...

President Donald Trump has ordered preparations to resume U.S. nuclear weapons testing, citing alleged Russian and Chinese violations. Moscow and Beijing deny conducting explosive nuclear tests but ...