Russia has proposed a de facto one-year extension of New START, but the president has yet to commit.

A science-oriented advocacy group moved its “Doomsday Clock” to 85 seconds to midnight, saying the Earth is closer than ever to destruction.

Trump said the fleet was larger than the one he sent to Venezuela, referring to his naval blockade of the South American country to prevent sanctioned oil tankers from leaving.

TRUMP TO IRAN: ‘NO NUCLEAR AND STOP KILLING PROTESTERS’: As President Donald Trump’s “beautiful armada is floating beautifully toward Iran,” as he described it to an Iowa audience this week, Trump is ...

Dmitry Medvedev said Moscow had not received a U.S. response to Russia's proposal to extend the New START treaty.

The United States and Russia could embark on an unrestrained nuclear arms race for the first time since the Cold War, unless they reach an eleventh-hour deal before their last remaining arms control ...

A representative of Los Alamos National Laboratory confirmed nuclear weapons research will be a priority for its portion of ...

Donald Trump says he has told Iran it has to do "two things" to avoid military action, as the US builds up its forces in the Gulf. "Number one, no nuclear. And number two, stop killing protesters," ...

With New START set to expire next week, a new arms race may be upon us ...

Spending hundreds of billions on new nuclear weapons would not make Russia, China or the United States more secure.

If Iranian leadership survives any U.S. attack, they will almost certainly double down on Iran's weapons program, argues a Middle Eastern security scholar.

As tensions soar over Iran’s bloody crackdown on nationwide protests, satellite images show activity at two Iranian nuclear ...