Nuke

Nuclear-weapons physicist Greg Spriggs rates eight nuclear-explosion scenes in movies such as "Oppenheimer" (2023) and Marvel's "The Avengers" (2012).

The president has sole authority to fire a nuclear weapon, but the steps aren't easy. Here's the procedure if the president called for nuclear strike.

South Korean military officials said the missile was fired from near Pyongyang, North Korea's capital.

For all its fighting talk, missile tests, and mooted plans for an attack on the US’s Pacific territory of Guam, North Korea is all bluster and little bite.

According to many defence analysts, the risk of nuclear confrontation over Europe and the Indian subcontinent has also increased in recent years.

Though the relationship between the US and North Korea can hardly be called stable, this so-far-rhetorical escalation is something new.

"Kim Jong Un understands that crossing the red line of a deliverable nuclear weapon would mean disaster."

This 50-year-old bomb packs quite a punch.

Seven other nuke-wielding nations also have not signed one of the planet's most important documents.

Experts fear refurbishing old nuclear weapons is fueling a new kind of arms race.

The nations that have — and have not — signed this important treaty are pretty surprising.