Dirty bomb
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The term '''dirty bomb''' is primarily used to refer to a '''radiological dispersal device''' ('''RDD'''), a [[radiological weapon]] which combines [[radioactive]] material with conventional [[explosive material|explosives]]. Though an RDD is designed to disperse radioactive material over a large area, a [[bomb]] that uses conventional explosives would likely have more immediate lethal effect than the [[radioactive]] material. At levels created from most probable sources, not enough [[radioactive contamination|radiation]] would be present to cause severe illness or death. A test [[explosion]] and subsequent calculations done by the [[United States Department of Energy]] found that assuming nothing is done to clean up the affected area and everyone stays in the affected area for one year, the radiation exposure would be "fairly high", but not fatal.<ref>[http://video.yahoo.com/watch/213659/1198382 Rockwell (2004) "The Power of Nightmares - BBC TV Documentary" Dr. Rockwell introduced 44:30, statement 45:00]</ref> Recent analysis of the [[Chernobyl accident]] fallout confirms this, showing that the effect on many people in the surrounding area, although not those in close proximity, was almost negligible.<ref>[http://news.bbc.co.uk/1/hi/sci/tech/5173310.stm BBC report on Chernobyl]</ref>
Because a [[terrorist]] dirty bomb is unlikely to cause many deaths, many do not consider this to be a [[weapon of mass destruction]].{{Fact|date=June 2008}} Its purpose would presumably be to create psychological, not physical, harm through ignorance, [[mass panic]], and terror. For this reason dirty bombs are sometimes called "weapons of mass disruption". Additionally, containment and [[decontamination]] of thousands of panic-stricken victims, as well as decontamination of the affected area might require considerable time and expense, rendering affected areas partly unusable and causing economic damage.
It is thought that during the 1960s the [[UK Ministry of Defence]] evaluated RDDs, deciding that a far better effect was achievable by simply using more high explosive in place of the radioactive material.{{Fact|date=February 2007}}
==Other uses of the term==
The term has also been used historically to refer to certain types of [[nuclear weapon]]s. Due to the inefficiency of early nuclear weapons, only a small amount of the [[nuclear material]] would be consumed during the explosion. [[Little Boy]] had an efficiency of only 1.4%. [[Fat Man]], which used a different design and a different [[fissile]] material, had an efficiency of 14%. Thus, they tended to disperse large amounts of unused [[fissile material]], and the [[fission product]]s, which are on average much more dangerous, in the form of [[nuclear fallout]]. During the 1950s, there was considerable debate over whether "clean" bombs could be produced and these were often contrasted with "dirty" bombs. "Clean" bombs were often a stated goal and scientists and administrators said that high-efficiency [[nuclear weapon design]] could create explosions which generated almost all of their energy in the form of [[nuclear fusion]], which does not create harmful fission products.
But the ''[[Castle Bravo]]'' accident of 1954, in which a [[nuclear weapon design|thermonuclear weapon]] produced a large amount of fallout which was dispersed among human populations, suggested that this was not what was actually being used in modern thermonuclear weapons, which derive around half of their yield from a final fission stage. While some proposed producing "clean" weapons, other theorists noted that one could make a nuclear weapon intentionally "dirty" by "salting" it with a material, which would generate large amounts of long-lasting fallout when [[irradiation|irradiated]] by the weapon core. These are known as [[salted bomb]]s; a specific subtype often noted is a [[cobalt bomb]].
== Dirty bombs and terrorism ==
Since the [[9/11]] attacks the fear of terrorist groups using dirty bombs has increased significantly, which has been frequently reported in the media <ref>Petroff (2007)</ref>. The meaning of the term [[terrorism]] used here, can be described by the [[U.S. Department of Defense]]'s definition, which is "the calculated use of unlawful violence or threat of unlawful violence to inculcate fear; intended to coerce or to intimidate governments or societies in the pursuit of goals that are generally political, religious, or ideological objectives" <ref>[http://www.dtic.mil/doctrine/jel/doddict/data/t/05436.html US Deparment of Defense Dictionary of Military and Associated Terms (April 2007)]</ref>.
Although there exists an increased fear of terrorists deploying dirty bombs, there has only ever been two cases of such, and neither was detonated. Both involved [[Chechnya]]. The first ever attempt of radiological terror was carried out in November 1995 by a group of [[Chechen people|Chechen]] [[separatists]], who buried a [[caesium-137]] source wrapped in explosives at the [[Izmaylovsky Park]] in [[Moscow]]. A Chechen rebel leader alerted the media, the bomb was never activated, and the incident amounted to a mere [[publicity stunt]] <ref>King (2004); [http://www.pbs.org/wgbh/nova/dirtybomb/chrono.html NOVA, Chronology of events]</ref>.
[[Image:Moscow_dirty_bomb.jpg|thumb|right|The caesium-filled package uncovered in Moscow’s [[Izmaylovsky Park]].]]
In December 1998 the second attempt was announced by the Chechen Security Service, who discovered a container filled with radioactive materials attached to an explosive mine. The bomb was hidden near a railway line in the suburban area [[Argun, Chechen Republic|Argun]], 10 miles east of the Chechen capital of [[Grozny]]. The same Chechen separatist group as above was suspected to be involved in the incident <ref>Edwards (2004); [http://www.pbs.org/wgbh/nova/dirtybomb/chrono.html NOVA, Chronology of events]</ref>.
It should be noted that despite the enhanced fear of a dirty bombing attack, it is very hard to assess whether the actual [[risk]] of such an event has increased significantly <ref name="Frost">Frost (2005)</ref>. The following discussions on implications/effects and probability of an attack, as well as indications of terror groups planning such, will be based mainly on [[statistics]], qualified guessing and a few comparable scenarios.
=== Effect of a dirty bomb explosion ===
When dealing with the implications of a dirty bomb attack, there are two main areas to be addressed: (i) the [[civilian]] impact, not only dealing with immediate casualties and long term health issues, but also the [[psychological]] effect and then (ii) the economical impact. With no prior event of a dirty bomb detonation, it is considered difficult to predict the impact. Several analyses have predicted that RDDs will neither sicken nor kill many people <ref>Reshetin (2005); Dingle (2005)</ref>.
=== Accidents with radioactives ===
The effects of uncontrolled [[radioactive contamination]] have been reported several times. One example is the radiological accident occurring in [[Goiânia]], [[Brazil]], between September 1987 and March 1988: Two metal scavengers broke into an abandoned [[radiotherapy]] clinic and removed a [[teletherapy]] source capsule containing powdered caesium-137 with an activity of 50 [[tera|T]][[Becquerel|Bq]]. They brought it home to one of the men to take it apart and sell it as scrap metal. Later that day both men were showing acute signs of radiation illness with [[vomiting]] and one of the men had a swollen hand and [[diarrhea]]. A few days later one of the men punctured the 1 [[millimetre|mm]] thick window of the capsule, allowing the powder to leak out and when realizing the powder glowed blue in the dark, brought it back home to his family and friends to show it off. After 2 weeks of spread by contact contamination causing an increasing number of adverse health effects, the correct diagnosis of acute [[radiation sickness]] was made at a hospital and proper precautions could be put into procedure. By this time a total of 249 people were contaminated, 151 exhibited both external and internal contamination of which 20 people were seriously ill and 5 people died <ref>King (2004); Zimmerman and Loeb (2004); Sohier and Hardeman (2006)</ref>.
The Goiânia incident to some extent predicts the contamination pattern if it is not immediately realized that the explosion spread radioactive material, but also how fatal even very small amounts of ingested radioactive powder can be <ref name="Zimmerman and Loeb">Zimmerman and Loeb (2004)</ref>. This raises new worries of terrorists using powdered [[alpha particle|alpha]] emitting material, that if ingested can pose a serious health risk <ref>Mullen et al. (2002); Reshetin (2005)</ref>, as in the case of now deceased former [[K.G.B.]] spy [[Alexander Litvinenko]], who either ate, drank or inhaled [[polonium]]-210. “Smoky bombs” based on alpha emitters might easily be just as dangerous as [[beta particle|beta]] or [[gamma ray|gamma]] emitting dirty bombs <ref>Zimmerman (2006)</ref>.
=== Public perception of risks ===
For the majority of people involved in an RDD incident, the radiation health risks (i.e. increased probability of developing cancer later in life due to radiation exposure) are small and comparable to the health risk from smoking five packages of cigarettes or eating ice cream on a daily basis <ref>Ring (2004)</ref>. The fear of radiation is not always logical although the exposure might be minimal; many people find radiation exposure especially frightening because it is something they cannot see nor feel and it thereby becomes an unknown source of danger. Dealing with public fear may prove the greatest challenge in case of an RDD event <ref>Johnson (2003)</ref>. Policy, science and media may inform the public about the real danger and thus reduce the possible psychological and economic effects.
Statements from the US government after 9/11 may have contributed unnecessarily to the public fear of a dirty bomb: when [[Attorney General]] [[John Ashcroft]] on June 10, 2002, announced the arrest of [[José Padilla (prisoner)|José Padilla]], allegedly plotting to detonate such a weapon, he said:
{{Quotation|[A] radioactive "dirty bomb" (…) spreads radioactive material that is highly toxic to humans and can cause mass death and injury.|Attorney General John Ashcroft|<ref name="Zimmerman and Loeb"/>}}
This public fear of radiation also plays a big role in why the costs of an RDD impact on a major metropolitan area (such as lower Manhattan) might be equal to or even larger than that of the 9/11 attacks.<ref name="Zimmerman and Loeb"/> Assuming the radiation levels are not too high and the area does not need to be abandoned such as the town of [[Pripyat]] near the [[Chernobyl]] reactor <ref>"The Lifeless Silence of Pripyat", ''Time Magazine'', June 23, 1986 [http://www.time.com/time/daily/chernobyl/860623.pixact.html Online article from Time Magazine]</ref>, an expensive and time consuming cleanup procedure will begin. This will mainly consist of tearing down highly contaminated buildings, digging up contaminated soil and quickly applying sticky substances to remaining surfaces to adhere the radioactive particles before they penetrate into the building materials <ref>Vantine and Crites (2002); Zimmerman and Loeb (2004); Weiss (2005)</ref>. These procedures are the current state of the art for radioactive contamination cleanup, but some experts claim that a complete cleanup of external surfaces in an urban area to current decontamination limits may not be technically feasible.<ref name="Zimmerman and Loeb"/> Loss of working hours will be vast during the cleanup period, but even after the procedures have been accomplished and the radiation levels reduced to an acceptable level, there might be residual public fear of the site including possible unwillingness to conduct business as usual in the area. Tourist traffic is likely never to resume.<ref name="Zimmerman and Loeb"/>
=== Constructing and obtaining material for a dirty bomb ===
In order for a terrorist organization to construct and detonate a dirty bomb, they must first acquire radioactive material either by stealing it or buying through legal or illegal channels. Possible RDD material could come from the millions of radioactive sources used worldwide in the industry, for medical purposes and in academic applications mainly for research <ref>Ferguson et al. (2003); Frost (2005)</ref>. Of these sources, only nine reactor produced [[isotope]]s stand out as being suitable for radiological terror: [[americium]]-241, [[californium]]-252, [[caesium-137]], [[cobalt]]-60, [[iridium]]-192, [[plutonium]]-238, [[polonium]]-210, [[radium]]-226 and [[strontium]]-90,<ref name="Frost"/> and even from these it is possible that radium-226 and polonium-210 do not pose a significant threat <ref name="Ferguson">Ferguson et al. (2003)</ref>. Of these sources the U.S. [[Nuclear Regulatory Commission]] has estimated that within the U.S., approximately one source is lost every day of the year either because they are lost, abandoned or stolen. Within the [[European Union]] the annual estimate is 70 <ref>Ferguson et al. (2003); Zimmerman and Loeb (2004)</ref>. There exists thousands of such "orphan" sources scattered throughout the world, but of those reported lost, no more than an estimated 20 percent can be classified as a potential high security concern if used in a RDD.<ref name="Ferguson"/> Especially [[Russia]] is believed to house thousands of orphan sources, which were lost following the collapse of the [[Soviet Union]]. A large but unknown number of these sources probably belong to the high security risk category; noteworthy are the very strong Russian beta emitting strontium-90 sources used as thermoelectric power generators for beacons in lighthouses in remote areas <ref>Burgess (2003); Van Tuyle and Mullen (2003); Sohier and Hardeman (2006)</ref>. In December 2001, three [[Georgians|Georgian]] woodcutters stumbled over such a power generator and dragged it back to their camp site to use it as a heat source. Within hours they suffered from acute radiation sickness and sought hospital treatment. The [[International Atomic Energy Agency]] (IAEA) later stated that it contained an amount of strontium equivalent to the amount of radiation released immediately after the [[Chernobyl disaster|Chernobyl accident]].<ref>[http://www.pbs.org/wgbh/nova/dirtybomb/chrono.html NOVA, Chronology of events]</ref>
[[Image:Georgia_thermal_generator.jpg|thumb|right|The [[Georgia (country)|Georgia]] radioactive device and its containment bucket with handles.]]
Although there exists a worry that terrorist organizations might obtain radioactive material through a "[[black market]]" <ref>King (2004); Hoffman (2006)</ref>, and there has been a steady increase in illicit trafficking of radioactive sources from 1996 to 2004, these recorded trafficking incidents mainly refer to rediscovered orphan sources without any sign of criminal activity,<ref name="Frost"/> and it has been argued that there is no real evidence for such a market <ref>Belyaninov (1994); Frost (2005)</ref>. In addition to the hurdles of obtaining usable radioactive material, there are several conflicting requirements regarding the properties of the material the terrorists need to take into consideration: First, the source should be "sufficiently" radioactive to create direct radiological damage at the explosion or at least to perform societal damage or disruption. Second, the source should be transportable with enough shielding to protect the carrier but not so much that it will be too heavy to manoeuvre. Third, the source should be sufficiently dispersible to effectively contaminate the area around the explosion.<ref name="Sohier and Hardeman">Sohier and Hardeman (2006)</ref>
An example of a worst case scenario is a terror organization possessing a source of very highly radioactive material, e.g. a strontium-90 thermal generator, with the ability to create an incident comparable to the Chernobyl accident. Although the detonation of a dirty bomb using such a source might seem terrifying, it would be hard to assemble the bomb and transport it without severe radiation damage and possible death of the perpetrators involved. Shielding the source effectively would make it almost impossible to transport and a lot less effective if detonated.
Because of the three above mentioned constraints in making an effective dirty bomb, RDDs might still be defined as "high-tech" weapons and this is probably why they have not been used up to now.<ref name="Sohier and Hardeman"/>
=== Possibility of terrorist groups using dirty bombs ===
The present assessment of the possibility of terrorists using a dirty bomb is based on cases involving one terrorist organization, namely [[Al-Qaeda]]. This is because the attempts by this group to acquire a dirty bomb are the most well-described in the literature, in part due to the attention this group received for the alleged involvement in the 9/11 attacks. Other groups may also be working on acquiring a dirty bomb, but they are not considered here due to the lack of publicly available information.
On 8 May 2002, [[José Padilla (prisoner)|José Padilla]] (a.k.a. Abdulla al-Muhajir) was arrested on suspicion that he was an Al-Qaeda terrorist planning to detonate a dirty bomb in the U.S. This suspicion was raised by information obtained from an arrested top Al-Qaeda official in U.S. custody, [[Abu Zubaydah]], who under interrogation revealed that the organization was close to constructing a dirty bomb. Although Padilla had not obtained any radioactive material or explosives at the time of arrest, law enforcement authorities uncovered evidence that he was on reconnaissance for usable radioactive material and possible locations for detonation <ref>Ferguson et al. (2003); Hosenball et al. (2002)</ref>. It has been doubted whether the alleged plotter, José Padilla, was preparing such an attack, and claimed that the arrest was highly politically motivated given the pre 9/11 security lapses by the [[CIA]] and [[FBI]] <ref>Burgess (2003); King (2004)</ref>. Later, these charges against José Padilla were dropped. Although there was no hard evidence for Al-Qaeda possessing a dirty bomb, there is a broad agreement that Al-Qaeda poses a potential dirty bomb attack threat <ref>King (2004); Ferguson et al. (2003)</ref> because they need to overcome the alleged image that the U.S. and its allies are winning the war against terror <ref>Petroff (2007)</ref>. A further concern is the argument, that "if suicide bombers are prepared to die flying airplanes into building, it is also conceivable that they are prepared to forfeit their lives building dirty bombs" <ref>Burgess (2003)</ref>. If this would be the case, both the cost and complexity of any protective systems needed to allow the perpetrator to survive long enough to both build the bomb and carry out the attack, would be significantly reduced.<ref name="Zimmerman and Loeb"/>
More recently [[Dhiren Barot]] from North London pleaded guilty of conspiring to murder innocent people within the [[United Kingdom]] and [[United States]] using a radioactive dirty bomb. He planned to target underground [[car park]]s within the UK and buildings in the U.S. such as the [[International Monetary Fund]], [[World Bank]] buildings in [[Washington D.C.]], the [[New York Stock Exchange]], [[Citigroup]] buildings and the [[Prudential Financial]] buildings in [[Newark, New Jersey]]. He also faces 12 other charges including, conspiracy to commit public nuisance, seven charges of making a record of information for terrorist purposes and four charges of possessing a record of information for terrorist purposes. Experts say if the plot to use the dirty bomb was carried out "it would have been unlikely to cause deaths, but was designed to affect about 500 people." [http://news.bbc.co.uk/1/hi/uk/6044938.stm]
== In popular culture ==
{{trivia|date=May 2008}}
* ''[[Dirty War (film)|Dirty War]]'', a 2004 [[BBC]]/[[HBO]] television film, features the detonation of a dirty bomb next to [[Liverpool Street tube station]] in [[Central London]].
* The novel ''Babylon Rising, Book 3: The Europa Conspiracy'' (2005) by [[Tim LaHaye]] & [[Lateef Marks]] includes a plot to detonate a dirty bomb over the [[George Washington Bridge]].
* In the first season of ''[[NUMB3RS]]'', the episode [[List of NUMB3RS episodes|''Dirty Bomb'']] (2005), features a group stealing a [[radioactive waste|nuclear waste]] truck and threatening to turn it into a dirty bomb
* In the novel ''A Very Dirty Business'' (2006) by Cuger Brant, a dirty bomb is detonated in [[Royal Tunbridge Wells|Tunbridge Wells]], [[Kent]], [[England]].
* In the film ''[[Right At Your Door]]'' (2006), several dirty bombs are detonated in the city of [[Los Angeles]].
* In the second season of [[Showtime]]'s ''[[Sleeper Cell (TV series)|Sleeper Cell]]'' (2006), a terrorist cell plots to plant a dirty bomb aboard an airplane to be detonated over the city of [[Los Angeles]].
* In the film [[Goldfinger (film)|Goldfinger]], Goldfinger has a dirty bomb that he is going to detonate inside [[Fort Knox]] for financial gain by contaminating the contents of Fort Knox, making his own deposits of gold more valuable. The bomb is made up of [[cobalt]] and [[iodine]].
* In the sixth season of the television series ''[[24 (TV series)|24]]'', a planned nuclear bomb in [[San Francisco]] turns into a dirty bomb, as the explosion was prevented but the nuclear components were compromised.
* In [[Body Count]]'s [[Murder 4 Hire]] (2006), in the song ''Dirty Bomb'' [[Ice-T]] mocks the hysteria he believes was created by dirty bombs, [[anthrax]], and other threats during the post [[9-11]] period, which he believes are driven by the media.
*In [[The Power of Nightmares]], a [[BBC]] documentary, dirty bombs were presented as an overblown threat, with bomb experts describing the reasons why this was so. Writer and narrator [[Adam Curtis]] connected its perceived effectiveness with hysteria over terrorism in general.
* In the final episode of [[Ultimate Force]], the British SAS series, a dirty bomb is set to go off in the centre of London.
== References ==
{{reflist}}
* [[Adam Curtis|Adam Curtis's]] [[The Power of Nightmares|The Power of Nightmares, Part III]] -- [http://www.informationclearinghouse.info/video1040.htm Video/Transcript] at [[Informationclearinghouse.info|Information Clearing House]]
==External links==
* U.S. Nuclear Regulatory Commission, [http://www.nrc.gov/reading-rm/doc-collections/fact-sheets/dirty-bombs.html Factsheet on Dirty Bombs]
* Al Qaeda's Nuclear Options - Crusade Media News - http://www.crusade-media.com/news1.html
* Council on Foreign Relations, [http://www.cfrterrorism.org/weapons/dirtybomb.html Terrorism Q&A: Dirty Bombs]
* U.S. Dep't of Labor Occupational Safety & Health Administration, [http://www.osha.gov/SLTC/emergencypreparedness/rdd_tech.html Radiological Dispersal Devices / Dirty Bombs]
* American Institute of Physics, [http://www.aip.org/isns/reports/2002/038.html "Dirty Bombs" Much More Likely to Create Fear than Cause Cancer]
* Federation of American Scientists, [http://www.fas.org/faspir/2002/v55n2/dirtybomb.htm Dirty bomb threat analysis]
* Health Physics Society, [http://hps.org/hsc/documents/factsheet.pdf Factsheet]
* Health Physics Society, January 2004 study, [http://hps.org/documents/RDD_report.pdf Dirty Bombs Could Cause Devastating Economic Damage]
* CNN, [http://archives.cnn.com/2002/HEALTH/06/10/dirty.bomb.health/ Explosion, not radiation, "dirty bomb's" worst fallout]
* PBS, NOVA, Dirty Bomb [http://www.pbs.org/wgbh/nova/dirtybomb/]This Web site was produced for PBS Online by WGBH.Web site © 1996-2003 WGBH Educational Foundation
*[http://www.tmia.com/industry/lost.html Lost and stolen nuclear materials in the US] Three Mile Island Alert describes the problem
* The Power of Nightmares [http://cryptome.org/terror-myth.htm]
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==See also==
*[[Area denial weapons]]
*[[Nuclear warfare]]
*[[Nuclear weapon]]
*[[Radiation hormesis]]
*[[Radiation poisoning]]
*[[Nuclear terrorism]]
*[[Nuclear weapon design]]
*[[Depleted uranium]]
*[[Gammator]]
*[[Nuclear 9/11]]
[[Category:Bombs]]
[[Category:Nuclear weapons]]
[[Category:Terrorism]]
[[Category:Nuclear terrorism]]
[[cs:Špinavá bomba]]
[[da:Beskidt bombe]]
[[de:Radiologische Waffe]]
[[es:Bomba sucia]]
[[eo:Malpura bombo]]
[[fa:بمب کثیف]]
[[fr:Bombe radiologique]]
[[he:פצצה מלוכלכת]]
[[ja:汚い爆弾]]
[[pl:Brudna bomba]]
[[ru:Радиологическое оружие]]
[[sk:Špinavá bomba]]
[[fi:Likainen pommi]]
[[sv:Smutsig bomb]]
[[zh:髒彈]]