But that peace would not be possible if North Korea pursued nuclear weapons.

There is no evidence that Iran is pursuing nuclear weapons.

"It really challenged the international community to get serious about this class of states pursuing weapons of mass destruction," she said.

South Korea has also vowed not to pursue nuclear weapons.

The Bush administration had sought permission to begin pursuing smaller nuclear weapons.

We knew his long history of pursuing, even using, weapons of mass destruction.

Iraq has aggressively pursued weapons of mass destruction, even while inspectors were inside the country.

Iraq has pursued nuclear weapons since the 1970's, but it has never produced a bomb.

But today we know that a sworn enemy is pursuing weapons of mass destruction.

He pursued chemical, biological, and nuclear weapons even while inspectors were in his country.