The Latest Breaking News from Nuclear Weapons

President Vladimir Putin says he will defend Russia's territory with every means at his disposal, and it's put the threat of nuclear war back into focus.

The United States would respond decisively to any Russian use of nuclear weapons against Ukraine and has spelled out to Moscow the "catastrophic consequences" it would face, US National Security Adviser Jake Sullivan said on Sunday. Sullivan's remarks represented the latest American warning following the thinly veiled nuclear threat made…

The United States would respond decisively to any Russian use of nuclear weapons against Ukraine and has spelled out to Moscow the "catastrophic consequences" it would face, U.S. National Security Adviser Jake Sullivan said on Sunday.

US national security adviser says: ‘Any use of nuclear weapons will be met with catastrophic consequences for Russia’

South Korea called an emergency National Security Council meeting where members denounced the launch as a clear violation of U.N. Security Council resolutions.

North Korea fired a short-range ballistic missile Sunday toward its eastern seas, extending its weapons testing as a U.S. aircraft carrier visits South Korea for joint military exercises.

Ukraine and Russia traded accusations on Sunday of attacks on civilians in southern Ukraine as Russian-occupied territories hold referendums on joining Russia that Western leaders have dismissed as staged attempts to annex more territory.

The Kremlin's statements on the possible use of nuclear weapons are "absolutely unacceptable" and Kyiv will not give into it, Ukraine's Foreign Minister Dmytro Kuleba said early on Sunday.

Russia's top diplomat on Saturday said regions of Ukraine where widely-derided referendums are being held would be under Russia's "full protection" if they are annexed by Moscow, amid fears Russia could further escalate the conflict and even use nuclear weapons.

Russian President Vladimir Putin has raised anew the possibility he might use nuclear weapons against Ukraine to prevail in a conflict going sideways. The smart money says he won’t, because doing so — or otherwise expanding the conflict drastically — wouldn’t make a bad situation any better.

Top EU diplomat Josep Borrell warned that the war has reached a “dangerous moment” and Western nations to be on high alert