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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. 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.
The United States biological weapons program officially began in spring 1943 on orders from U.S. President Franklin Roosevelt. Research continued following World War II as the U.S. built up a large stockpile of biological agents and weapons. Over the course of its 27-year history, the program weaponized and stockpiled the following seven bio-agents :
The M139 bomblet was an American sub-munition designed for use in warheads as a chemical cluster munition. Each spherical bomblet held 590 grams (1.3 lb) of sarin nerve agent.
The E120 bomblet was a biological cluster bomb sub-munition developed to disseminate a liquid biological agent. The E120 was developed by the United States in the early 1960s.
The M143 bomblet was a biological cluster bomb sub-munition developed by the United States during the 1960s. The spherical bomblet was the biological version of the Sarin-filled M139 chemical bomblet.
The M33 cluster bomb, also known as the (M33) Brucella cluster bomb, was a U.S. biological cluster bomb developed in the early 1950s and deployed in 1952. It was the first standardized biological weapon in the U.S. arsenal.
The M114 bomb was a four-pound U.S. anti-personnel bomb and biological cluster bomb sub-munition. The M114 was used in the M33 cluster bomb.
The Flettner rotor bomblet was a U.S. biological sub-munition that was never mass-produced. Based on the vertical Flettner rotor which takes advantage of the Magnus effect, a force acting on a spinning body in a moving airstream, it was developed toward the end of the U.S. biological weapons program in the 1960s.
The M34 cluster bomb was the first mass-produced United States Army weapon meant to deliver the chemical agent sarin (GB). A large stockpile of M34s was destroyed between 1973 and 1976.
The M138 bomblet was a sub-munition of the U.S. chemical weapon, the M43 BZ cluster bomb. The bomblet contained BZ, an incapacitating agent and was developed with the M43 in 1962. The M138s, along with all other U.S. BZ weapons were destroyed during the 1980s.
The M44 generator cluster was an American chemical cluster bomb designed to deliver the incapacitating agent BZ. It was first mass-produced in 1962 and all stocks of the weapons were destroyed by 1989.
The E14 munition was a cardboard sub-munition developed by the United States biological weapons program as an anti-crop weapon. In a series of field tests in 1955, the E14 was loaded with fleas and air-dropped.
The E61 anthrax bomblet was an American biological sub-munition for the E133 cluster bomb. This anti-personnel weapon was developed in the early 1950s and carried 35 milliliters of anthrax spores or another pathogen.
The M125 bomblet was a U.S. chemical sub-munition designed to deliver the nerve agent sarin. It was brought into service in 1954 with the M34 cluster bomb as part of the first U.S. air-delivered nerve agent weapon.
The E133 cluster bomb was a U.S. biological weapon developed during the Cold War.
The E48 particulate bomb was a U.S. biological sub-munition designed during the 1950s for use with the E96 cluster bomb.
Before the 20th century, the use of biological agents took three major forms:
The United States biological defense program—in recent years also called the National Biodefense Strategy—refers to the collective effort by all levels of government, along with private enterprise and other stakeholders, in the United States to carry out biodefense activities.
Anthrax weaponization is the development and deployment of the bacterium Bacillus anthracis or, more commonly, its spore, as a biological weapon. As a biological weapon, anthrax has been used in biowarfare and bioterrorism since 1914. However, in 1975 the Biological Weapons Convention prohibited the "development, production and stockpiling" of biological weapons. It has since been used in bioterrorism.
References
- "Chemical and Biological Weapons: Possession and Programs Past and Present", James Martin Center for Nonproliferation Studies, Middlebury College, April 9, 2002, accessed November 12, 2008.
- "Biological Weapons", Federation of American Scientists , updated October 19, 1998, accessed November 12, 2008.
- Croddy, Eric C. and Hart, C. Perez-Armendariz J., Chemical and Biological Warfare, (Google Books), Springer, 2002, pp. 30–31, ( ISBN 0387950761).
- Kirby, Reid. "The CB Battlefield Legacy: Understanding the Potential Problem of Clustered CB Weapons", Army Chemical Review , pp. 25–29, July–December 2006, accessed November 12, 2008.
- Kirby, Reid. "The Evolving Role of Biological Weapons", Army Chemical Review, pp. 22–26, July–December 2007, accessed November 12, 2008.
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