North Korea’s leader threatens to speed up Pyongyang’s nuclear arsenal expansion over a sign of ‘hostile intent’.

Pyongyang regularly criticizes such drills as rehearsals for invasion and sometimes responds with weapons tests, but Seoul ...

The blinding detonation over the Pacific was not the product of a nuclear bomb, but of a colossal conventional explosion, one of the most audacious weapons tests in history. The searing wall of air ...

South Korea and its ally the United States kicked off joint military drills this week, including testing an upgraded response to heightened North Korean nuclear threats ...

Space is fast emerging as the next battleground — where cyberattacks, nuclear threats, and lunar competition are reshaping ...

Debating U.S. nuclear strategy.

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.

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

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.