Nuclear War (Response to Donald and William's presentation)

The presentation from Donald and William points out an important idea that we should keep our eyes on the development of nuclear technology.
In the above video, we can actually feel the power of using nuclear weapon. It only takes three seconds to destroy the entire city. Hence, a country that has the ability to handle nuclear technology will definitely posses a higher political power and be consider as a powerful nation; for this reason, many nations put numerous of resource in developing their own nuclear technology. Apparently, Iran is one of the nations that want to acquire higher international status. Yet, people worry that once Iran can fully handle the nuclear technology, they will use it in military purpose. Also, since conflict between Iran and U.S become larger and larger, people is now worrying that World War III will eventually happen and the world will probably be destroyed because of utilizing nuclear weapons.