We aks Mr. Obama to reduce the amount of nuclear weapons.

Now days, we have a huge amount of nuclear weapons. However, the exact number of nuclear weapons in global arsenals is not known because almost all countries with nuclear weapons will never be willing to let others know the amount. We can just make some guess. In a word, it is national secrets. As everyone knows, dropping one nuclear bomb is horrible enough, it can cause many huge damages, for example, cities leveled and populations vaporized. Can you ever imagine when you use 17,300 nuclear weapons in this planet? It is a big danger with can destroy the whole world for sure. So, in order to make everyone feels better and create a safer world, we should take some action for these problems and reduce the amount of weapons.