What happens to Iran’s enriched uranium stockpile, including the 970 pounds that it has highly concentrated to near-weapons grade, is one of the primary sticking points as the US and Iran have trudged ...

Weapons-grade plutonium can fuel nuclear reactors known as mixed oxide reactors, but none of these exist in the U.S. Bypass the Strait of Hormuz with nuclear explosives? The U.S. studied that option ...

Reports a test firing of a Trident missile from a Royal Navy submarine has failed for the second time in a row has refocused attention on the UK's nuclear capability. The current Vanguard nuclear ...

The world nuclear order exists only in the minds of those who postulate it. The history of nuclear power over the last 80 ...

For decades, nuclear weapons have been treated as the ultimate arbiter of international politics. They were supposed to deter great-power war, impose caution on leaders, and anchor what strategists ...

MATTHEW SHARP is a Senior Fellow at the Center for Nuclear Security Policy at the Massachusetts Institute of Technology. He worked on nuclear issues at the State Department and at ...