Where are terrorists most likely to get the radioactive materials needed to make a dirty bomb?
The most dangerous radioactive materials are found in nuclear power plants and sites where nuclear weapons are made. However, security at these places makes obtaining materials from them difficult. Because of the danger and difficulty involved in getting radioactive materials from a nuclear facility, there is a greater chance that the radioactive materials used in a dirty bomb would come from other sources with much lower levels of radioactivity. Low-level radioactive materials can be found in such places as hospitals (where they are used for diagnostic procedures and cancer treatments), construction sites (where they are used in industrial radiography), and university research laboratories.
