Iran has issued a rare nuclear attack survival guide advising citizens to seek shelter, shut off outside-air ventilation and avoid radioactive contamination. The advisory comes amid speculation over a ...

Add Yahoo as a preferred source to see more of our stories on Google. DoD/Wikimedia Commons Nuclear weapons produce frighteningly massive detonations that destroy everything in their path. They've ...

Nuclear weapons produce frighteningly massive detonations that destroy everything in their path. They've only ever been used once during wartime, and the bombs of today are even deadlier than the one ...