fbi's terrorist explosive device analytical center or tdac, and the aff's national center known as ncedar, these two national assets will help law enforcement officials deal with the growing threat posed by terrorists in criminal use of powerful explosives. you and i have discussed these facilities previously. i believe you agreed then with me that the missions of n cedar and tdac are distinct but complimentary and that it made sense to co-locate them at red stone where there's a lot of property, a lot of land. for the benefit of the committee, mr. attorney general, can you describe how the department. of justice will utilize n cedar and tdac. >> -- run chiefly by the fbi deals with the examination of ieds we see coming out of afghan stand and other places. n cedar in contrast run by the atf deals with -- i wouldn't want to call them the more common. >> more prevalent maybe. >> more prevalent explosive devices. the location of them in that place i think makes a whole lot of sglens could you describe the value of co-locating these facilities on a large federal arsenal with lots of range of