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---
category: "Nuclear Scientists & Programs"
summary: "The Dimona facility, officially known as the Negev Nuclear Research Center, stands as a deeply clandestine and pivotal complex within Israel's national security apparatus, nestled in the arid Negev Desert south of Jerusalem."
start: 1958
location: "Negev Desert, Israel"
---
The [[Dimona]] facility, officially known as the Negev Nuclear Research Center, stands as a deeply clandestine and pivotal complex within [[Israel]]'s national security apparatus, nestled in the arid [[Negev Desert]] south of [[Jerusalem]]. Its existence and operations are central to [[Israel]]'s undeclared nuclear weapons program, embodying the nation's commitment to [[The Samson Option (GFE)]], a doctrine of last resort that envisions massive nuclear retaliation in the face of an existential threat. This facility is not merely a research center but a fully operational industrial complex dedicated to the production of weapons-grade plutonium and the development of advanced nuclear armaments.
### History and Construction
The genesis of [[Dimona]] can be traced back to the early 1950s, driven by the unwavering vision of [[Israel]]i leaders such as Prime Minister [[David Ben-Gurion]], Defense Minister [[Shimon Peres]], and the brilliant scientist [[Ernst David Bergmann]]. [[Ernst David Bergmann|Bergmann]], often hailed as the "scientific father of the [[Israel]]i bomb," tirelessly championed the pursuit of nuclear capabilities, believing it to be the ultimate guarantor of [[Israel]]'s survival in a hostile region. [[France]] emerged as [[Israel]]'s indispensable partner in this ambitious endeavor, providing critical expertise and resources. [[Israel]]i scientists were granted unprecedented access to [[France|French]] nuclear facilities, including [[Marcoule]] and [[Saclay]], gaining invaluable knowledge and experience. This collaboration culminated in late 1955 when [[David Ben-Gurion|Ben-Gurion]] formally sought [[France|French]] assistance in constructing a large nuclear reactor and a chemical reprocessing plant on [[Israel]]i soil. The agreement was reportedly solidified in the aftermath of the 1956 [[Suez Crisis]], with [[Guy Mollet|French Prime Minister Guy Mollet]] famously declaring, "I owe the bomb to them" [^1]. The [[Saint-Gobain|French]] chemical firm, Saint-Gobain, was subsequently contracted to undertake the construction of the crucial underground reprocessing facility.
Groundbreaking for the EL-102 reactor commenced in early 1958, marking the physical manifestation of [[Israel]]'s nuclear aspirations. The remote [[Negev Desert]] site rapidly transformed into a bustling "French boom town," as hundreds of [[France|French]] engineers and technicians, eventually numbering up to 2,500, arrived to oversee and execute the complex construction. The reactor achieved criticality in 1962, demonstrating its capacity to operate at over 70 megawatts (MW), significantly higher than the publicly acknowledged 24 MW. This enhanced operational capacity was vital for producing larger quantities of plutonium, a key ingredient for nuclear weapons. By mid-1964, the underground reprocessing plant, a marvel of engineering with its remote-controlled laboratories and computer-driven machinery, was largely completed and poised to begin extracting weapons-grade plutonium from the reactor's spent uranium fuel rods. This progress continued despite [[Charles de Gaulle|French President Charles de Gaulle]]'s public attempts to distance [[France]] from the project [^2]. The immense financial undertaking of [[Dimona]], estimated to cost billions of dollars, was partially sustained through covert fundraising efforts led by figures like [[Shimon Peres]] and [[Abraham Feinberg]], who solicited contributions from wealthy [[American]] and [[European]] Jews [^2].
### Operational Details and Facilities (Based on Mordecai Vanunu's Revelations)
The intricate workings of [[Dimona]] were brought to light in 1986 through the detailed revelations and photographs provided by [[Mordecai Vanunu]], a former technician at the facility. His disclosures offered an unprecedented glimpse into [[Israel]]'s advanced nuclear capabilities. The complex comprises the main reactor and at least eight other specialized buildings, or Machons, each serving a distinct function in the nuclear fuel cycle.
[[Machon 1]] houses the large, silver-domed reactor, a prominent structure 60 feet in diameter, visible even from nearby highways. This heavy-water moderated reactor utilizes uranium fuel rods, which remain within its core for approximately three months. The heavy water coolant is, in turn, cooled by ordinary water flowing through a heat exchanger, generating steam that, unlike in a conventional power plant, is vented directly into the atmosphere, creating a radioactive cloud [^3].
The most sensitive and critical component of [[Dimona]] is [[Machon 2]], the chemical reprocessing plant, informally known as "The Tunnel." This six-level underground facility is where plutonium is meticulously extracted through chemical processes from the highly radioactive spent uranium rods. Operating around the clock for 34 weeks annually, "The Tunnel" is a testament to advanced engineering and stringent security. Within this facility, an observation area in the control room, affectionately dubbed "Golda's Balcony," commemorates [[Golda Meir|Prime Minister Golda Meir]]'s frequent visits during her tenure [^3]. On level five of "The Tunnel," weapons-grade plutonium is precisely molded into hemispheres for warheads within sealed glove boxes, alongside the fabrication of other crucial chemicals like lithium and beryllium. [[Mordecai Vanunu|Vanunu]]'s accounts indicated a steady weekly production of 1.2 kilograms of pure plutonium [^3].
Beyond the core reprocessing functions, other Machons contribute to the overall operation. [[Machon 3]] is responsible for converting lithium-6 into a solid form suitable for nuclear warheads and for processing natural uranium for the reactor. [[Machon 4]] manages the waste treatment processes for the radioactive residues generated by [[Machon 2]]. [[Machon 5]] applies an aluminum coating to the uranium rods, prepared in [[Machon 3]], before their insertion into the reactor. [[Machon 6]] provides essential basic services and power to the entire [[Dimona]] complex. Advanced research and development take place in [[Machon 8]], which notably includes [[Special Unit 840]], where [[Israel]]i scientists pioneered a gas centrifuge method for uranium enrichment. Further enrichment capabilities are housed in [[Machon 9]], a laser-isotope-reprocessing facility. Finally, [[Machon 10]] is dedicated to the chemical isolation of depleted uranium, which is then prepared for military applications or commercial sale [^3]. The facility also includes specialized units for tritium production, with Unit 92 having removed tritium from heavy water since the 1960s, and Unit 93, opened in 1984, focusing on large-scale tritium production. Tritium is a vital component for "boosted" fission weapons and neutron bombs, underscoring [[Israel]]'s pursuit of sophisticated nuclear designs [^3].
### Security and Secrecy
From its inception, [[Dimona]] has been shrouded in an unparalleled veil of secrecy, a testament to [[Israel]]'s determination to conceal its nuclear ambitions. The [[Israel]]i government consistently maintained elaborate cover stories, publicly asserting that the facility was solely dedicated to peaceful purposes such as scientific research, seawater desalinization, or agricultural development [^4]. This narrative was meticulously crafted to deflect international scrutiny.
Despite these denials, [[American]] intelligence, particularly through [[U-2 Spy Plane|U-2]] spy plane overflights beginning in the late 1950s, gathered early evidence of the clandestine construction. From 1962 to 1969, [[American]] inspection teams, notably led by [[Floyd L. Culler, Jr.]], conducted scheduled visits to [[Dimona]]. However, these inspections were largely a "whitewash," as [[Israel]] employed sophisticated deception tactics. This included the construction of a false control room, complete with fake panels and measuring devices designed to mimic a 24 MW research reactor, and the use of elaborate camouflage, such as covering bunkers with sod, to mislead inspectors [^5]. The inspections ultimately ceased in 1969 under the [[Nixon Administration]], which implicitly acknowledged [[Israel]]'s nuclear status without public declaration.
The protection of [[Dimona]]'s secrets was a paramount concern, leading to the creation of the Office of Special Tasks (later known as [[LAKAM]]), an intelligence agency specifically tasked with this mission. Led by figures like [[Binyamin Blumberg]], [[LAKAM]] agents operated globally, collecting technical information and establishing front companies to acquire high-tech equipment that would otherwise be denied to [[Israel]] due to export controls [^3]. [[Israel]]i security forces maintained constant vigilance, actively monitoring and deterring any attempts at unauthorized photography or infiltration, engaging in a prolonged "cat-and-mouse game" with [[American]] intelligence [^6].
### Nuclear Arsenal and Testing
[[Dimona]]'s operational success paved the way for [[Israel]]'s emergence as a nuclear power. Well-placed [[Israel]]i sources indicate that at least one successful low-yield nuclear test was conducted in an underground cavern in the [[Negev Desert]] during the mid-1960s [^7]. By early 1968, [[Dimona]] had transitioned to full-scale production, manufacturing an estimated 4 to 5 warheads annually. By the time of the [[Yom Kippur War]] in September 1973, [[Israel]]'s nuclear arsenal was believed to comprise at least 20 warheads [^8].
A significant event in [[Israel]]'s nuclear history occurred on September 22, 1979, when [[Israel]], in conjunction with [[South Africa]], conducted a low-yield nuclear test over the [[South Indian Ocean]]. This event was detected by the [[VELA Satellite|U.S. VELA satellite]], providing concrete evidence of [[Israel]]'s nuclear capability [^9]. [[Mordecai Vanunu|Vanunu]]'s later revelations further underscored the sophistication of [[Israel]]'s nuclear program, suggesting its capacity to manufacture advanced thermonuclear weapons, including low-yield neutron bombs [^3].
### Strategic Significance
The existence and output of [[Dimona]] form the bedrock of [[Israel]]'s nuclear deterrent strategy. The facility's continuous production of plutonium and its capability to develop advanced warheads have enabled [[Israel]] to maintain a policy of "strategic ambiguity" regarding its nuclear capabilities. This deliberate lack of official confirmation, coupled with the implied threat of a nuclear arsenal, serves to enhance [[Israel]]'s perceived security in a volatile and often hostile region. The [[The Samson Option (GFE)]], deeply intertwined with [[Dimona]]'s capabilities, represents [[Israel]]'s ultimate assurance against existential threats, a powerful and silent guarantor of its survival.
### Footnotes
[^1]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 3.
[^2]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 5.
[^3]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 15.
[^4]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 6.
[^5]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 8.
[^6]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 4.
[^7]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 10.
[^8]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 13.
[^9]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991, Chapter 20.

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---
tags:
- Concept
- Nuclear Facility
- Israel
category: "Nuclear Scientists & Programs"
summary: "Machons are the various buildings and facilities within the Dimona nuclear complex in Israel. As described by Mordecai Vanunu, the complex includes the reactor and at least eight other self-contained buildings, each with a specific function in the..."
location: Dimona, Negev Desert, Israel
---
Machons are the various buildings and facilities within the [[Dimona]] nuclear complex in [[Israel]]. As described by [[Mordecai Vanunu]], the complex includes the reactor and at least eight other self-contained buildings, each with a specific function in the nuclear production process. The entire complex is a testament to Israeli ingenuity and secrecy, with significant portions constructed underground to conceal their true purpose.[^1]
### Machon 1 (The Reactor)
Machon 1 is the large, silver-domed reactor, sixty feet in diameter, prominently visible from the nearby highway. This reactor is cooled and moderated by heavy water, with uranium fuel rods remaining inside for three months. Unlike a typical nuclear power plant that would use the generated steam to drive a turbine and create electricity, the steam in Machon 1 is vented directly into the atmosphere. This process creates a radioactive cloud, which, according to Vanunu, was intentionally vented only on days when prevailing winds would carry it towards the [[Jordanian]] border, approximately twenty-five miles to the east. Such a venting was reportedly photographed by Army Colonel [[Carmelo V. Alba]] in 1965, providing the [[Central Intelligence Agency|CIA]] with concrete evidence that [[Dimona]] was operational.[^1]
### Machon 2 (The Tunnel - Chemical Reprocessing Plant)
Machon 2, informally known as the Tunnel, is the most essential and sensitive facility at [[Dimona]]. It is a six-level, highly automated chemical reprocessing plant, dug to a depth of eighty feet underground. Its surface appearance is that of an ordinary administration building—a nondescript, two-story, windowless structure, eighty by two hundred feet, containing a workers' canteen, shower rooms, offices, and warehouse space. The building features thickly reinforced walls, a safety measure given its location. A bank of elevators on the top floor was routinely bricked over before foreign visitors, such as American inspection teams led by [[Floyd L. Culler, Jr.]], were permitted to enter, effectively concealing the underground operations. No outsider is known to have ever entered the reprocessing plant itself.[^1]
Within Machon 2, plutonium, a by-product of the fission process in the reactor, is chemically extracted from spent uranium rods. These rods must first be cooled for weeks in water-filled tanks to reduce radioactivity by several thousand times before reprocessing can begin. Even then, the rods remain lethal and are handled exclusively by remote control from behind lead shielding. The production hall, where the spent uranium rods undergo reprocessing, dominates levels one through four underground. Work here is monitored from a large control room, which includes an observation area known to technicians as "Golda's Balcony," a reference to [[Golda Meir]]'s frequent visits after she became prime minister.[^1]
According to Vanunu, the chemical processing results in a weekly average of nine "buttons" of pure plutonium, with a combined weight of 1.2 kilograms. The Tunnel operates around the clock for thirty-four weeks a year, shutting down from July to November for routine maintenance and repair. The reprocessing methods employed are described as routine, utilizing industrial solvents and solutions similar to those used at the Savannah River Plant in [[South Carolina]]. If Vanunu's reported production rate of 1.2 kilograms weekly is accurate, the reactor would need to operate at approximately 120 to 150 megawatts—more than five times its officially stated output—and consume nearly one hundred tons of uranium ore annually, producing enough enriched materials for four to a dozen or more bombs a year, depending on warhead design.[^1]
### Machon 3
Machon 3 is responsible for converting lithium 6 into a solid form, which is then prepared for insertion into nuclear warheads. Additionally, this facility processes natural uranium for use in the reactor.[^1]
### Machon 4
This building houses the waste treatment plant, which manages the radioactive residue generated from the chemical reprocessing activities conducted in Machon 2.[^1]
### Machon 5
Machon 5 is where the uranium rods, after being processed in Machon 3, are coated with aluminum. This coating prepares them for consumption within the reactor. Once stacked in the reactor's core, these rods provide the necessary fuel to sustain a chain reaction and capture weapons-grade isotopes of plutonium.[^1]
### Machon 6
Machon 6 serves as a central utility and power facility, providing basic services and energy for the entire [[Dimona]] complex.[^1]
### Machon 8
Machon 8 contains a laboratory dedicated to testing samples and experimenting with new manufacturing processes. It is also the site of Special Unit 840, where Israeli scientists have developed a gas centrifuge method for enriching uranium, specifically for weapons applications.[^1]
### Machon 9
This facility is equipped with a laser-isotope-reprocessing system, which is used for the enrichment of uranium.[^1]
### Machon 10
Machon 10 is where depleted uranium—uranium with very little or no uranium 235 remaining—is chemically isolated. This depleted uranium is then prepared for eventual shipment to the Israeli Defense Force or for sale to arms manufacturers in [[Europe]] and elsewhere, where it is used in the production of bullets, armor plating, and artillery and bomb shells.[^1]
### Warhead Fabrication and Assembly
Within Machon 2, on level five, the plutonium is fabricated by machine in a secure area. This is the only floor to which [[Mordecai Vanunu]] was denied access. This level contains separate, isolated rooms where weapons-grade plutonium, now in metal form, is stored inside sealed glove boxes filled with argon, an inert gas. Workers manipulate remote-controlled robotic devices by hand to mold plutonium pellets into microscopically thin hemispheres for insertion into nuclear warheads. Other chemicals crucial to the Israeli nuclear arsenal, such as lithium compounds and beryllium, are also machine-fabricated on this level. The milling process requires exquisite machinery due to the extremely tight tolerances necessary for a functional bomb core; even a microscopic flaw can significantly reduce the yield or lead to a failure.[^1]
Once completed, the weapons parts are transported by convoys of unmarked cars, under armed guard, to another undisclosed facility north of [[Dimona]] for final assembly into warheads. Israeli officials have indicated that this final stage of warhead production occurs at a defense plant north of [[Haifa]], operated by [[Rafael]], [[Israel]]'s top-secret research and manufacturing agency responsible for its most sensitive weaponry.[^1]
### Footnotes
[^1]: Hersh, Seymour M. *The Samson Option: Israel's Nuclear Arsenal and American Foreign Policy*. Random House, 1991. Chapter 15.

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---
category: "Military Installation"
tags:
- Geography
- United_States
- Arkansas
- 1980s
- Contra_War
- Dark_Alliance_Investigation
summary: Small Arkansas town where Barry Seal based drug-smuggling and weapons operations at Intermountain Regional Airport during the Contra war.
---
Mena, Arkansas is a small town in western Arkansas where [[Barry Seal]] based his drug-smuggling and weapons operation at Intermountain Regional Airport during the early to mid-1980s.[^1] Mena became a hub for CIA-connected covert operations during the Contra war, involving drug trafficking, weapons manufacturing, and pilot training for the [[Contras]].
### Barry Seal's Operations
Seal moved from [[Baton Rouge, Louisiana|Baton Rouge]] to Mena in 1982 and began running drugs and weapons. In the early 1980s, Seal was one of the biggest cocaine and marijuana importers in the southern [[United States]], flying loads in directly for the [[Medellin Cartel|Medellín cartel]] and air-dropping them with pinpoint precision across [[Louisiana]], [[Arkansas]], and other southern states. IRS spokesman Henry Holms said Seal was involved in 50 drug-smuggling trips between 1981 and 1983, and a letter from Louisiana's attorney general to U.S. Attorney General Ed Meese said Seal "smuggled between $3 billion and $5 billion worth of drugs into the U.S."[^1]
Seal's personal records showed him to be a contract [[Central Intelligence Agency]] operative both before and during his years of drug-running at Mena. Historian [[Roger Morris]], a former NSC staffer, wrote that Seal also worked for the [[Defense Intelligence Agency|Defense Intelligence Agency (DIA)]], "where coded records reportedly showed him on the payroll beginning in 1982."[^1]
### Terry Reed and Weapons Manufacturing
Former Air Force intelligence officer [[Terry Reed]] was initially recruited to train would-be Contra pilots at a clandestine airstrip near Nella, Arkansas, not far from Mena. Later, he claimed, he was asked to help the CIA set up secret weapons parts facilities in Arkansas and [[Mexico]]. One company Reed worked with was [[Park On Meter]] Inc. in Russellville, Arkansas, which he claimed was secretly manufacturing parts for M-16 rifles as a subcontractor on a CIA weapons project to supply the Contras. The *Washington Post* confirmed that the parking meter company "did make some gun parts for Iver Johnson," though it disputed the significance.[^1]
### Government Knowledge
Clinton's critics charged that it was impossible for the governor of Arkansas to have been unaware of Seal's activities at Mena. Former Arkansas state trooper Larry Patterson, a member of Governor Clinton's security detail, testified that he and other troopers were aware "that there was large quantities of drugs being flown into the Mena airport, large quantities of money, large quantities of guns, that there was an ongoing operation training foreign people in that area. That it was a CIA operation." Mechanic John Bender swore in a deposition that he saw Clinton at Mena three times in 1985.[^1]
Ex-trooper L. D. Brown said that when he confronted Clinton about the cocaine flights, the governor replied, "That's Lasater's deal," referring to [[Danny Ray Lasater]].[^1]
### Suppression of Investigations
The same Senate subcommittee that looked into the Contras' connections with [[Hondu Carib Cargo]] in 1988 also investigated Mena and concluded that "associates of Seal who operated aircraft service businesses at the Mena, Arkansas, airport were also the targets of grand jury probes into narcotics trafficking. Despite the availability of evidence sufficient for an indictment on money laundering charges, and over the strong protests of State and federal law enforcement officials, the cases were dropped. The apparent reason was that the prosecution might have revealed national security information."[^1]
In sworn testimony, a former staff member of the Arkansas State Police Intelligence Unit described "a shredding party" in which she was ordered to purge the state's Mena files of nearly a thousand documents, including those referring specifically to Iran-Contra conspirator [[Oliver North]] and Seal associate Terry Reed.[^1]
### CIA Acknowledgment
While denying that the CIA was involved in any illegal activities at Mena during the time Seal's drug-smuggling operation was based there, the CIA's Inspector General's Office confirmed in 1996 that the CIA ran a "joint training operation with another federal agency at Mena Intermountain Airport." The IG report, which has never been publicly released, reportedly claims the exercise lasted only two weeks, but conveniently omits the year. The CIA also used the Mena airport for "routine aviation related services" on CIA-owned planes, according to a declassified summary of the report.[^1]
### The Fat Lady
Seal's drug-hauling airplane, a Fairchild C-123K called The Fat Lady, was based at Mena before Seal sold it and it began flying weapons-hauling missions for North and the [[FDN]]. The plane was shot down over [[Nicaragua]] in 1986 by a Sandinista soldier with a SAM-7 missile, breaking open the [[Iran-Contra Affair]].[^1]
### Footnotes
[^1]: Webb, Gary. *Dark Alliance: The CIA, the Contras, and the Crack Cocaine Explosion.* Seven Stories Press, 1998. Chapter 6: "They were doing their patriotic duty"