Pakistan's military said earlier that the prime minister had called on the authority to meet. The information minister did not respond immediately to a request for comment.

Any conflict over Taiwan will be another catastrophe for the world

Even though it is a chilling concept, there are credible precedents of nuclear winter.

In a nuclear war, who struck first is irrelevant when we consider its consequences.

North Korea says a nuclear war on the Korean Peninsula has become a matter of when, not if, as it continued to lash out at a massive joint military exercise between the United States and South Korea involving hundreds of advanced warplanes.

Scientists are set to announce today whether the civilization is any closer or farther from disaster based on a "Doomsday Clock" that measures the likelihood of a global catastrophe.