I've seen a lot of posts on here where the use of nuclear weapons is casually tossed around like it happens all the time. Well, I have been playing Civ since the week it came out, and I have never seen anyone use nuclear weapons. What does it take to get the AI to use them? In my current game, Egypt built the Manhattan project, and later declared war on me. I was just waiting for the nuclear explosion, but no matter how long the war goes on and how many cities I take, they never use them. I've even captured two cities with a nuclear weapon in them, so I know they have them. Are they waiting for me to strike first or what?