Chemical, biological (CB) — and sometimes radiological — warfare agents were assigned what is termed a military symbol by the U.S. military until the American chemical and biological weapons programs were terminated (in 1990 and 1969, respectively). Military symbols applied to the CB agent fill, and not to the entire weapon. A chemical or biological weapon designation would be, for example, "Aero-14/B", which could be filled with GB, VX, TGB, or with a biological modification kit – OU, NU, UL, etc. A CB weapon is an integrated device of (1) agent, (2) dissemination means, and (3) delivery system. Military symbols can sometimes reflect the name of where a chemical agent is manufactured. For example, chloropicrin has the symbol PS, which was derived from the British town in which it was manufactured during the First World War: Port Sunlight. Chemical agents Blood agents AC – hydrogen cyanide CK – cyanogen chloride SA – Arsine Choking agents BBC – bromobenzyl cyanide CL – chlorine CG – phosgene DP – diphosgene KJ – stannic chloride NC – 80% chloropicrin, 20% stannic chloride PS – chloropicrin Blister agents H – mustard gas HD – distilled mustard gas T – O-Mustard Q – sesquimustard L – Lewisite HL – mustard-lewisite mixture HT – mustard-T mixture HQ – mustard-Q mixture HN – nitrogen mustard ED – ethyl dichloroarsine MD – methyl dichloroarsine PD – phenyl dichloroarsine CX – Phosgene oxime Tear agents CA – camite CN – mace CNB – mace-benzene mixture CNC – mace-chloroform mixture CND CNS – mace-chloropicrin-chloroform mixture CS – CS gas CS1 – micropulverized CS CS2 – microencapsulated CS CR – CR gas CH – Vomiting agents DA – diphenylchlorarsine DC – diphenylcyanoarsine DM – Adamsite Psycho agents BZ – 3-quinuclidinyl benzilate SN – sernyl (PCP) K – lysergic acid diethylamide (LSD) [EA 1729] Nerve agents GA – tabun [EA1205] GB – sarin [EA1208] GB2 – sarin as a binary agent from mixing OPA (isopropyl alcohol+isopropyl amine) + DF [EA5823] GD – soman [EA1210] GF – cyclosarin [EA1212] GE – ethyl sarin GH – O-isopentyl sarin [EA1221] GS – S-butyl sarin [EA1255] GV – (dimethylaminoethyl phosphorodimethyl amidoylfluoridate) [EA5365] VE – VE nerve agent [EA1517] VG – Amiton (O,O-diethyl-S-[2-(diethylamino)ethyl] phosphorothioate) [EA1508] VM – Edemo [EA1664] VS – (O-Ethyl S-2-(diisopropylamino)ethyl ethylphosphonothiolate) [EA1677] VP – (3-pyridyl 3,3,5-trimethylcyclohexyl methylphosphonate) [EA1511] VR – VR nerve agent (O-isobutyl S-(2-diethaminoethyl) methylphosphothioate) VX – VX nerve agent [EA1701] TZ –