The laboratory is already gearing up, he said, to produce "pits," devices that act as a kind of nuclear trigger.

The Derawar blast was almost certainly the field test of a nuclear trigger.

The world is right to fear the prospect of religious fanatics with their finger on a nuclear trigger.

The investigation led to the arrests and convictions of the company's top officers for trying to ship nuclear triggers to Iraq.

Some argue that we need to know everything about the man who has his finger on the nuclear "trigger."

A nuclear trigger is hardly top secret research, even I could probably build one based on open knowledge.

The president is a madman bent on pulling the nuclear trigger.

Intelligence experts believe that he may have several nuclear weapons, making him the least understood of any leader with a finger on a nuclear trigger.

The Labour party is opposed absolutely to the creation of a new nuclear power, especially one with 12 or more fingers on the nuclear trigger.

It isn't entirely clear whose finger is currently on North Korea's nuclear trigger.