while inspection procedures as specific as those for nuclear weapons have not been developed for chemical and biological threats, on-site inspection is likely to be needed, as far more chemical and biological manufacturing processes have dual-use properties: they can be employed for perfectly legitimate civilian purposes. the director of dtra is also "dual-hatted" as the head of the center for combating weapons of mass destruction (scc wmd), an agency of the us department of defense's strategic command. this mission also relates to that of the cia counterproliferation center.