Jon Wolfsthal

By waging war on Iran, the president is making it more likely that other countries develop nuclear weapons—to protect themselves from the U.S.

Putin says he’ll do whatever it takes in Ukraine. Biden is warning of “Armageddon.” Sixty years after the U.S.–Soviet standoff over Cuba, why is nuclear war still an ever-present worry?

The predictable result of the Trump administration's incoherent foreign policy

No, really: Does anyone know what the agreement Trump just signed in Singapore is supposed to mean?

This is probably not the end of North Korea nuclear talks.

Here's exactly what the U.S. loses as Trump scraps the Iran nuclear deal.

North Korea's announcement that it will be shutting down its nuclear tests is great news. But there's one giant caveat here.

How Trump is increasing the risk of nuclear war