The U.S. and Israel had a "flawed assumption" that the death of Supreme Leader Ayatollah Ali Khamenei would lead to the collapse of the regime, said an expert on the region.

Ted Cruz told Margaret Brennan that he did not believe Iran was "anywhere close" to having a nuclear weapon ever since Operation Midnight Hammer.

Finland plans to lift a ban on importing nuclear weapons, citing NATO membership and the need to strengthen national defense.

President Trump launched military strikes on Iran after several rounds of talks over the country's nuclear program and uranium stockpiles. Here's what to know about the nuclear program.

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to completely transform its nuclear arsenal into the world’s most technologically advanced,

Canadian and Australian prime ministers have called for a de-escalation of the Iran war but added the Iranians must never gain a nuclear weapon.

Finnish law has historically prohibited the importation or deployment of a nuclear weapon anywhere on its territory—but this is expected to change soon.