From the abstract: "There has been significant discussion regarding federal and state preparedness for nuclear terrorism within the United States. This is a very broad and complex public policy issue. The efforts of federal agencies provide a sense of the framework and capacity of the US government to prevent, protect, respond, and recover given the scenario of a terrorist group's use of an improvised nuclear device. There are numerous federal programs supporting prevention and protection actions, with somewhat lesser development of response and recovery actions. However, it remains difficult to assess whether these actions are adequate or if more needs to be done, because the overall metrics for success have not been determined. A public policy approach to evaluating preparations for a nuclear terrorist event is required to allow decision makers to evaluate and better implement these efforts."
Homeland Security Affairs Journal: http://www.hsaj.org/hsa/
Homeland Security Affairs (June 2012), v.8, article 9