This pamphlet contains a summary of typical agents and chemical, biological, radiological, or nuclear (CBRN) devices available to al-Qa'ida and other terrorist groups. It is not intended to be a summary of the overall threat from al-Qa'ida's CBRN program. Chemical agents covered include cyanides, mustard agents, nerve agents (sarin, tabun, and VX), and toxic industrial chemicals. Biological agents covered include anthrax, botulinum toxin, and ricin. Radiological and nuclear agents covered include radiological dispersal agents (RDD) (dirty bombs, unshielded devices) and improvised nuclear devices (IND) (implosion and gun assembled). This pamphlet also includes a list of additional online resources. A version without graphics is also available at /homesec/docs/cia/CBRN-threat-wo.pdf.