Nuclear

Scientists have used satellite data to determine the size of the bomb North Korea detonated in 2017. Results suggest it could have been twice as powerful as U.S. intelligence predicted at the time.

An investigation by The Los Angeles Times and Columbia University's Graduate School of Journalism found the dome is barely holding it together as it is. Rising sea levels could tip it over the edge.

Gorbachev signed several pivotal anti-nuclear proliferation agreements with the U.S. during his time as the last leader of the Soviet Union.

Some 50 U.S. warheads are believed to be deployed at the Incirlik air base in southern Turkey, but reports this weekend suggested officials were reviewing plans for their removal.

Pyongyang tested the Pukguksong-3 ballistic missile on Wednesday, ahead of the resumption of disarmament talks with the U.S. this weekend.

The study quantifies just how catastrophic and wide-reaching a nuclear conflict between the two nations would be.

Ex-White House national security adviser John Bolton rebuked President Donald Trump's repeated North Korea disarmament claims, declaring Monday that Kim Jong-Un "will never give up its nuclear weapons voluntarily."

Pyongyang has conducted seven rounds of short-range missile tests since July with denuclearization talks with the U.S. in limbo.

Victor Cha was nominated to become Trump's ambassador to South Korea but was dropped after warning the White House against a pre-emptive strike on the North.

"It's not a stretch to say that Donald Trump's most lasting legacy may well be writing what he calls love letters to a dictator in North Korea," Joe Scarborough said.

Russia's weather agency data showed barium, strontium, and lanthanum isotopes were released from blast at Nyonoksa test site in the Arkhangelsk region.

The explosion killed at least five people and is believed to have involved a new nuclear-powered cruise missile.

The 21,000-ton Akademik Lomonosov is being sent to remote Siberian to provide power for local oil platforms.

Just as Russia's floating nuclear power unit began a journey toward Alaska, a radioactive missile accident shrouded in mystery raised more concerns about Moscow's record.

Radioactive pee is just one of the strange incidents cited in a new report from the Australian Radiation Protection and Nuclear Safety Agency.

Foreign Minister Javad Zarif gave an interview in New York City, where he is under tight visa restrictions, during a visit to the United Nations.

The RS-28 Sarmat is reportedly able to carry a nuclear payload capable of destroying an area the size of Texas.

"Russia probably is not adhering to its nuclear-testing moratorium," Lieutenant General Robert Ashley said.

"We're not looking for regime change...we're looking for no nuclear weapons," Trump said.

Syria and North Korea teamed up to build a nuclear reactor designed to look like an ancient fort in the Syrian desert. How would the world look if Israel hadn't taken action?

President Donald Trump threatened "the official end of Iran" in a tweet days earlier.

"The prospect for resolving the nuclear issue will be much gloomier" without a U.S. pivot, a North Korean foreign ministry official said.

Trump won't get far unless he "moves away from maximalist demands and demonstrates that he can be a credible partner in diplomacy," said Arms Control Association's Kelsey Davenport.

"#WeHaveTheWatch," the North American Aerospace Defense Command (NORAD) tweeted.

China warned that a "certain major country has withdrawn from one international treaty and mechanism after another while building up its own nuclear and missile power."

Iranian Foreign Minister Mohammad Javad Zarif challenged President Donald Trump to "drain the swamp" of Washington war hawks like John Bolton.

Major General Hossein Salami, head of Iran's Revolutionary Guard, warned that his country was nearing "a full-scale confrontation with the enemy."

As The Century Foundation's Dina Esfandiary argued, however, "I don't think they're worried about not having international support."

Central Command said a U.K. coalition general's comments "run counter to the identified credible threats available to intelligence from U.S. and allies regarding Iranian backed forces in the region."

"That's what happens when you listen to the mustache," Iranian presidential adviser Hesameddin Ashena tweeted to Trump in an apparent reference to national security adviser John Bolton.