Weapons of mass destruction that cause a chain reaction by splitting the nucleas of an uranium atom, thus causing two particles to fly out, that cause two other uranium atoms to become unstable and change into another element because they have an extra particle. This causes each of those two to fire off two particles each, and so the chain continues. This rapid expansion will eventually move onto the area surrounding it, and destroy it by means of reacting with it. Of course, in the time it has taken you to read this, a nuclear weapon, some as small as 11 inches could have scorched hundreds of miles worth of land surrounding it
Nuclear Weapons will bring the apocalypse, at which point many atheists will become religious, many religious will become atheist, and our skin will melt off.