Debating U.S. nuclear strategy.

North Korean leader Kim Jong Un called Tuesday for the "rapid expansion" of the country's nuclear weapons capability, citing ...

SEOUL, South Korea — North Korean leader Kim Jong Un condemned South Korean-U.S. military drills and vowed a rapid expansion ...

National security officials say Russia is developing a nuclear, space-based weapon designed to take out virtually every ...

Stopping nuclear proliferation in the Middle East will require a consistent policy, not just sporadic interventions.

Outer space has emerged as the world's next battlefield, demonstrated by recent cyberattacks on satellites blamed on Russia.

North Korean leader Kim Jong Un said his country needed to rapidly expand its nuclear armament and called U.S.-South Korea ...

Terence Tarnowsky, a physicist at Los Almos National Laboratory (LANL), will present his results at the fall meeting of the ...

The final pillar of a once-robust set of arms control treaties between the U.S. and Russia expires in six months.

In an ever more dangerous world the focus should be on how we can limit, not increase, the risk of major nuclear conflicts.

By Mark Trevelyan LONDON (Reuters) -Russian President Vladimir Putin said on the eve of a summit with U.S. President Donald ...

Russian President Vladimir Putin said on the eve of a summit with U.S. President Donald Trump that their countries might ...