World map with nuclear weapons development status represented by color.      Five "nuclear weapons states" from the NPT (Nuclear Non-Proliferation Treaty)      Other known nuclear powers      States suspected of being in the process of developing nuclear weapons and/or nuclear programs      States which at one point had nuclear weapons and/or nuclear weapons research programs      States capable of developing nuclear weapons within several years if the decision to do so were made

Nuclear proliferation is when a country starts making nuclear objects. On the right is a map showing who has nuclear reactors and weapons, and who could have them. When a country starts making nuclear weapons, they become a nuclear power. view more...