Moscow and Washington trapped themselves in a cycle of fear over Iran.

To reduce the danger of Israel starting a war that it needs the United States to finish, U.S. officials should make it very clear—ideally in public as well as in private—that the U.S. commitment to Israeli security is conditional.

There's a new Russian weapon under development. A source has confirmed to NPR that the weapon is some kind of space-based nuclear system for targeting satellites.

Are the Russians developing space-based nuclear weapons?

China’s growing nuclear arsenal has prompted a debate about how the United States should adapt its nuclear posture to the emergence of a second “nuclear peer.” The central issue is the arcane subject of nuclear targeting: the question of what facilities the United States should, in the detached language of nuclear strategists, “hold at risk,” or in plain English, threaten to nuke.

While the wars in Ukraine and Israel have been dominating headlines, there have also been rumblings about an interest in Russia to restart nuclear testing.

Before responding to the challenge of two nuclear peers, the United States should revisit the question of which nuclear strategy can best achieve its goals of preventing nonnuclear aggression against itself and its allies, avoiding nuclear war, and avoiding catastrophic escalation if nuclear war occurs.

Canberra should push to alleviate itself of the burden of managing spent fuel while enhancing commitments to nonproliferation.

A conversation about the state of nuclear nonproliferation today, against the backdrop of a proposed resumption of nuclear testing by North Korea and the implied threat of the use of tactical nuclear weapons by Russia in Ukraine.