The increased use of terrorism by terrorist groups requires NATO and its allies to re-examine existing security norms. A need to re-evaluate the approach to deterrence by establishing new non-proliferation initiatives, as well as strengthening existing ones, has become necessary to effectively target non-state adversaries. The use of WMD by terrorist groups, as in the case of Aum Shinrikyo, necessitates the need to adequately defend against these types of threats; however, there is no “silver-bullet” which can prevent WMD terrorism. The chain of actions that lead to a WMD attack presents NATO and its allies with opportunities to thwart the terrorists and those who support them.