After the Second World War, nuclear proliferation has been in full speed after the 1960-1990s. The country who has mostly advanced its nuclear technology was pioneered by the Unitd State, followed by the Soviet Union after the Second World War. Neighboring countries such as France, Germany, and China also developed their own nuclear weapon in order counter nuclear threat that could arise for their countries. This event lead to an arms race, backed by the cold war between the US and USSR. To date, the development of nuclear weapons has been watered down especially after the disintegration of the Soviet Union where the efforts of developing nuclear weapons has been diverted to the of the energy research.