The secretive Russian satellite in space that U.S. officials believe is connected to a nuclear anti-satellite weapon program ...

The non-partisan Congressional Budget Office's estimate does not include recently discovered cost overruns in the Sentinel ...

Russia reserves the right to use nuclear weapons in the event it faces aggression by Western countries, Moscow's top security ...

Imangali Tasmagambetov, the secretary-general of the Collective Security Treaty Organization, spoke at a conference this week ...

The U.S. Air Force 2nd Bomb Wing and 5th Bomb Wing, operators of the nuclear-capable B-52H bombers, recently participated in ...

Acquiring nuclear weapons would take Australia down a costly, contentious and perilous path. But with Trump in the White ...

US allies were alarmed when Trump, following a heated argument with Ukraine President Volodymyr Zelenskyy at the White House, ...

Allowing Iran to keep a civil nuclear program—never mind a weapons program—may set a bad precedent for nonproliferation ...

Secretary of State Marco Rubio says Iran must give up all nuclear enrichment if it wants to make a deal during talks with the ...

Authorities in Ohio plan to test the groundwater supply across a village near a former weapons plant after a newspaper investigation published Friday found high levels of radioactivity in samples ...

The U.S. Supreme Court is considering arguments about temporary storage sites for the country's 90,000 tons of nuclear waste.