Small CBRN Attacks, Mass Disruption: Gary Ackerman

Editorial disclosure: this article is based on publicly available research by Gary Ackerman and colleagues, including work published through the National Consortium for the Study of Terrorism and Responses to Terrorism (START). Gary Ackerman, Michelle Jacome, START, National Defense University Press, the FBI, EPA, CDC, NIOSH, and OSHA are not affiliated with CBRNMASKS.COM and have not endorsed the company or any product it offers. Analysis, preparedness conclusions, and product recommendations are by David Magen alone.

The phrase "weapon of mass destruction" pushes the imagination toward the largest possible event: a nuclear detonation, a citywide biological release, or a military-grade chemical attack producing thousands of casualties. Gary Ackerman argues that this framing can obscure a more practical security problem. Chemical, biological, and radiological materials can be used on a much smaller scale — without approaching the technical definition of a true WMD — and still force evacuations, close transport systems, contaminate buildings, interrupt public services, and generate fear far beyond the number of people physically harmed.

The CBRN Attack Does Not Have to Be Massive — What Gary Ackerman's Research Means for Families

A localized CBRN attack can fail to qualify as mass destruction and still succeed as mass disruption. That distinction matters for preparedness. A family, hospital, hotel, school, or warehouse is unlikely to defeat a sophisticated mass-casualty weapon through personal equipment. It may, however, face a localized release, suspicious powder, toxic industrial chemical incident, or contaminated area in which rapid decisions, movement to clean air, and respiratory protection for a defined task determine whether a limited event expands.

This analysis is best read alongside when to evacuate or shelter in place and Dan Kaszeta's police CBRN-readiness analysis. Together, they connect the threat picture with its operational and civilian-preparedness implications.

The Expert Who Studies the Attacker's Decision

Gary Ackerman is an associate professor in emergency preparedness and homeland security and the founding director of the Unconventional Weapons and Technology Division at the National Consortium for the Study of Terrorism and Responses to Terrorism (START), based at the University of Maryland. His approach is valuable because it begins with behavior rather than spectacle — instead of assuming that every extremist wants the largest conceivable weapon, Ackerman asks what the actor is trying to achieve, what resources are available, what technical barriers must be overcome, and whether a smaller attack can deliver sufficient publicity, fear, disruption, or status.

CBRN Is a Category; WMD Is a Consequence

Ackerman's central distinction: CBRN is a category of hazards; WMD is a description of consequences. A chemical, biological, or radiological agent does not automatically become a weapon of mass destruction merely because it sounds exotic. The amount, delivery system, target, environmental conditions, and operational competence determine whether an incident produces local injury, widespread disruption, or catastrophic mass effects. For violent non-state actors, the lower end of that spectrum is often more attainable — a small group may lack the secure facilities and engineering expertise required for a true mass-casualty weapon, but may still obtain a toxic chemical, create a crude device, contaminate an object, or exploit an industrial source.

This is why the most useful planning question is not "Could this destroy a city?" It is "Could this force the closure of the building, station, school, hospital entrance, or distribution center on which people depend?"

An Agent Is Not Yet a Weapon

Ackerman separates the harmful agent from the delivery system. A pathogen, toxic chemical, or radioactive source may be dangerous, but the attacker must still move it, release it, keep it potent, expose the intended population, and avoid incapacitating the operation before it reaches the target. In many historical cases, the delivery problem — not access to a frightening material — has been the decisive barrier. This protects against exaggerated marketing: owning a canister labelled for broad hazards does not mean the user can safely enter any CBRN environment.

Why Smaller Chemical Attacks Remain Plausible

Ackerman notes that chemical incidents have historically formed the largest category in databases of non-state CBRN pursuit and use. The reason is not that sophisticated nerve agents are easy to manufacture — it is that the chemical spectrum includes common toxic industrial materials, simple poisons, choking agents, and substances that already exist in transport, manufacturing, agriculture, and water treatment. Small- and medium-scale chemical attacks therefore impose fewer technical barriers than true chemical WMD.

A deliberate release can also resemble an accident during the first minutes. People may report an odor, burning eyes, coughing, collapse, or an unexplained cloud without knowing whether the source is malicious, industrial, or domestic. The protective action is initially the same: increase distance, avoid the plume or enclosed space, follow official instructions, and do not approach the source to investigate. For a clean-shaven adult escaping through a known, oxygen-sufficient environment, a correctly selected full-face air-purifying system may reduce inhalation and eye exposure. That sentence contains every important limitation: "known" means the filter is documented for the hazard; "oxygen-sufficient" means the system is not being used where breathable oxygen may be displaced; "escaping" means moving away, not searching the building or remaining to film the event.

The Anthrax Letters: Disruption Without Mass Destruction

The 2001 anthrax letters mailed in the United States killed five people and sickened 17. The investigation eventually involved more than 10,000 interviews, thousands of environmental samples, numerous searches, and the development of new forensic methods. Mail systems, congressional offices, media organizations, laboratories, and public-health agencies all had to operate under biological uncertainty. The physical casualty count did not capture the full institutional cost. The 2013 ricin letters demonstrate the same asymmetry at a smaller scale: letters addressed to senior public officials contained a toxin that can cause poisoning through inhalation, ingestion, or injection. No illness was reported from the letters, but locations were sealed, public-health authorities were activated, and specialized teams performed evidence collection and testing. The mass disruption was real even though mass destruction did not occur.

Radiological Terrorism Is Usually About Disruption, Not a Nuclear Blast

Ackerman argues that many radiological scenarios could produce severe anxiety and disruption even when immediate radiation injuries are limited. A central district may be cordoned off, transportation interrupted, property surveyed, and surfaces decontaminated while specialists map contamination. The public cannot see radiation, and ordinary protective instincts do not reliably indicate danger. A respirator can reduce inhalation of radioactive particulate when the correct particulate filtration is used — but it does not shield the body from penetrating radiation. A gas mask should never be marketed as protection against "radiation" without explaining that it only addresses an inhalation pathway for airborne particles, not external gamma or other penetrating exposure.

Mass Disruption Can Be the Objective

Ackerman identifies the psychological characteristics that make CBRN attractive to non-state actors: the hazard may be invisible, invasive, delayed, and poorly understood by the public. An incident can therefore generate uncertainty far outside the contaminated area. A closed station affects commuters who were never exposed. A suspicious package interrupts a government building. This also means that calm, accurate protective communication is a form of defense. Organizations that know who can close ventilation, who calls emergency services, and which room can be isolated are less vulnerable to cascading confusion. A mask can protect an airway under defined conditions. A plan protects the organization from making the event larger than it is.

Building a Practical Family Respiratory-Protection Kit

Adults: the Israeli 4A1 Black Diamond Simplex is genuine Israeli full-face civil-defense equipment — panoramic visor, 40mm filter connection, hydration tube, sealed Israeli filter. For bearded users, the Israeli Sapphire PAPR hood avoids the seal problem created by facial hair.

Children, ages 2–8: the MAMTAK / Quartz child PAPR hood — powered filtered airflow for younger children who cannot reliably seal a conventional adult mask.

Infants and toddlers, ages 0–2: the Multipro infant protection system — designed for very young children who cannot use a standard gas mask.

Children, ages 8–14: the Israeli 10A1 child gas mask.

Filters: CBRNMASKS.COM offers Israeli PA-12 and M80 Type 80 40mm CBRN/NBC filters. Air-purifying respirators and PAPRs do not supply oxygen and are limited by the exact facepiece, filter, fit, concentration, and atmosphere.

Explore the Israeli CBRN Family Bundle or the complete range at CBRNMASKS.COM.

Protect Your Family

4A1 for adults, Sapphire for beards, MAMTAK / Quartz for ages 2–8, Multipro for infants. Sealed 40mm filters for every mask. Israeli CBRN Family Bundle for the complete household. CBRNMASKS.COM — Israeli civil-defense equipment, in service since 2009.

Primary Sources

Analysis and preparedness conclusions by David Magen — former Combat Investigation Officer, Doctrine and Training Division, IDF Operations Directorate; former Staff Officer, National Emergency Authority, continuity planning for local authorities, Haifa region. Founder of CBRNMASKS.COM since 2009. Gary Ackerman, START, the University of Maryland, and the other cited authors and institutions did not sponsor, review, or endorse this article.

Back to blog