Overview
Project MK-NAOMI was a classified joint program between the Central Intelligence Agency and the U.S. Army's Special Operations Division (SOD), headquartered at Fort Detrick, Maryland. Operating from the late 1940s through at least the early 1970s, it served as the biological and toxicological counterpart to the CIA's broader MK-ULTRA behavioral research effort. Where MK-ULTRA pursued mind control through chemical and psychological means, MK-NAOMI focused on a narrower and more lethal objective: the development, production, and storage of biological agents and toxins that could be employed in covert operations — including targeted killings — without detection.
The program's existence was not publicly confirmed until the mid-1970s, when a series of congressional investigations and executive-branch reviews exposed the covert activities that had been conducted under its umbrella for decades.
The CIA–Fort Detrick Partnership
The operational heart of MK-NAOMI was the relationship between CIA technical officers and the Army's Special Operations Division at Fort Detrick, the Army's primary biological warfare research installation. Documented records show that the CIA funded research at Fort Detrick and maintained a collaborative arrangement in which Army scientists developed agents and devices that CIA officers could then draw upon for clandestine use.
The Special Operations Division was a compartmented unit within Fort Detrick with a mandate that extended beyond conventional military biological warfare planning. Under the MK-NAOMI framework, SOD scientists worked on agents that were specifically tailored to covert rather than battlefield use — criteria that emphasized properties such as undetectability in standard autopsy toxicology, rapid action, and delivery in quantities too small to be physically apparent on a victim's body.
Documented records from the Church Committee investigation confirmed that the CIA maintained a separate stockpile of biological and toxin materials at a location under CIA rather than Army control, an arrangement that allowed the agency to retain custody of materials independently of the Army chain of command.
Agents, Toxins, and Delivery Systems
MK-NAOMI research encompassed a range of biological agents and naturally derived toxins. Among the materials documented in post-1975 disclosures were shellfish toxin (saxitoxin), cobra venom, and other substances with the capacity to cause death or incapacitation. The program also reportedly examined pathogens capable of inducing illness that could be attributed to natural causes.
The program placed particular emphasis on delivery. One of the most extensively documented products of MK-NAOMI research was a device that became publicly known during the Church Committee hearings as the "heart attack gun" — a purpose-built dart projector capable of firing a small frozen projectile composed of shellfish toxin suspended in ice. The dart, roughly the diameter of a human hair, was designed to penetrate skin and dissolve, leaving only a microscopic entry wound that would be overlooked in a routine autopsy. The toxin itself, once absorbed, could induce cardiac arrest in the target. Because saxitoxin degrades quickly in biological tissue and autopsy toxicology screens of the era did not routinely test for it, the cause of death would in most circumstances be recorded as a heart attack.
The CIA's then-Director of Central Intelligence appeared before the Church Committee in September 1975 alongside a CIA technical officer who demonstrated the device to the Senate panel. Photographs from the hearing were subsequently published in the press, making the dart gun one of the most concrete and widely recognized artifacts associated with the MK-NAOMI program.
Beyond targeted-killing devices, MK-NAOMI research extended to agents intended for wider operational contexts, including materials that could be used to contaminate food or water supplies, destroy enemy crops (anti-agricultural biological warfare), and incapacitate rather than kill specific individuals. The program also contributed to the development of materials for agent-carried "suicide pills" — small, readily concealed items that captured CIA personnel could use to avoid interrogation.
The 1969–1970 Destruction Orders and the 1975 Discovery
In November 1969, President Richard Nixon issued an executive order renouncing the United States' offensive biological weapons program and directing the destruction of all existing stockpiles of biological agents. A subsequent order in 1970 extended the ban to toxin weapons — naturally derived substances that occupied a legal gray zone between biological and chemical agents. The Army and relevant agencies were directed to destroy their holdings.
Documented records subsequently established that the CIA did not fully comply. When President Gerald Ford's administration commissioned a review of CIA activities in 1975 — an internal review led by Vice President Nelson Rockefeller that preceded the congressional investigations — inspectors discovered that a CIA officer had retained a stockpile of shellfish toxin and other materials in defiance of the 1969–1970 destruction orders. The cache had been kept at a CIA facility rather than transferred to military disposal, apparently on the personal initiative of the officer responsible for its custody.
The retained stockpile became one of the more concrete exhibits in the Church Committee's examination of CIA activities that exceeded legal and executive authority. The committee's final reports documented the existence of MK-NAOMI, the Fort Detrick relationship, and the circumstances of the illegal retention, establishing an official public record of a program that had previously existed only in highly classified channels.
Scope and Limits of the Documentary Record
The Church Committee investigation and subsequent declassification efforts established the broad outlines of MK-NAOMI, but significant gaps remain in the documentary record. Many MK-NAOMI files were destroyed — along with the bulk of MK-ULTRA records — in 1973, on the order of then-CIA Director Richard Helms, in anticipation of congressional scrutiny. The destruction of those records means that the full scope of agents developed, operations conducted, and targets considered under MK-NAOMI cannot be reconstructed from surviving documents alone.
What the documentary record does confirm is the institutional relationship between the CIA and the Army's Special Operations Division, the categories of agents and devices pursued, the 1969–1970 destruction orders, and the non-compliance that led to the 1975 discovery. Claims that go beyond those confirmed facts — including specific alleged assassination operations attributed to MK-NAOMI-derived materials — remain unverified and should be understood as allegations rather than established history.
The program is regarded by historians of U.S. intelligence as a significant case study in the absence of effective oversight mechanisms during the Cold War era, and in the institutional tendency of intelligence agencies to treat executive orders as subject to independent interpretation when operational equities were perceived to be at stake.