Although some terrorist groups clearly have the intent to use weapons of mass destruction, the credibility of the nuclear terrorist threat is still unclear. Even though acquiring, assembling and creating nuclear weapons remains an extremely difficult task for terrorists, this does not mean that it is impossible. The materials and technology necessary for nuclear weapons are present in our world and are not kept as safely as we would hope. Joint participation in ventures such as the Global Initiative or Combat Nuclear Terrorism along with coordination in the area of defense and law enforcement are necessary to combat terrorists with nuclear or radiological aspirations.