For decades, North Korea has acted as the world’s most aggressive exporter of missile and nuclear technology, with Iran its most valuable customer. This partnership undermines U.S. interests across the Middle East and erodes the global nonproliferation order.
After the late Iraqi President Saddam Hussein’s use of chemical weapons against Iran during the1980–1988 Iran-Iraq War, then-Supreme Leader Ayatollah Ruhollah Khomeini ignored a fatwa he had previously issued against nuclear weapons and began pursuing an alternative arms race.
Pakistan’s Abdul Qadeer Khan delivered critical nuclear technology, including P-1 centrifuge designs, components for thousands of machines, and uranium hexafluoride gas. Those transfers established the foundation for Iran’s uranium enrichment facilities at Natanz and Fordow.
Ayatollah Ruhollah Khomeini ignored a fatwa he had previously issued against nuclear weapons and began pursuing an alternative arms race.
At the same time, Khan negotiated with North Korea. In exchange for Nodong missile technology—which Pakistan rebranded as the Ghauri—Pyongyang obtained centrifuge designs and enrichment know-how. Khan made at least thirteen visits to North Korea before his 2004 confession. He transferred roughly twenty to twenty-four P-1 and advanced P-2 centrifuges, along with more than 2,000 components and sub-assemblies.
The result was a lethal loop: Pakistan shared enrichment secrets with both countries. North Korea began not only collaborating in nuclear matters with Iran but also delivering advanced missile systems knowledge to the ayatollah’s regime. Although the network surfaced in 2004 and sanctions followed, the core transfers never fully ended.
With the nuclear connection secured, the missile partnership accelerated. In 1987 alone, North Korea shipped as many as 100 Scud-B missiles to Iran. Total Scud-B and Scud-C transfers reached approximately 200–300 by the early 1990s. North Korean technicians converted Iranian maintenance facilities into production lines.
By the mid-1990s Pyongyang delivered about 150 Nodong medium-range ballistic missiles. These became the direct template for Iran’s Shahab-3 family, with a range exceeding 1,300 kilometers capable of striking deep inside Israel. Iranian engineers worked alongside North Korean specialists to adapt the design for underground silos and solid-fuel variants.
North Korea even applied the same model to Syria. In the early 2000s, it sent technicians to build a plutonium-production plant at the Al-Kibar site in Syria’s eastern desert. The facility mirrored North Korea’s Yongbyon reactor in design, fuel-rod configuration, and capacity. On September 6, 2007, Israeli aircraft destroyed the reactor in a precision strike weeks before it could go critical. North Korean personnel were present; some died in the operation. The episode proved Pyongyang would export not only missiles but also the infrastructure for nuclear weapons to any Middle Eastern client.
North Korean specialists still supply tunnel-construction expertise, guidance upgrades, and components.
Three years earlier, on April 22, 2004, a blast measuring 3.6 on the Richter scale ripped through Ryongchon station near the Chinese border. It killed 154 people, including about twelve Syrian nuclear and missile scientists returning from technical exchanges in North Korea. Syrian aircraft repatriated the bodies in lead-lined coffins. Several intelligence assessments suggested an Israeli operative was in Pyongyang days before the explosion. North Korea called it an ammonium nitrate accident; analysts saw it as a targeted disruption of the Syria-North Korea pipeline.
But that pipeline never closed. United Nations panels documented resumed joint missile development in 2020, with critical parts transferred via scheduled flights. North Korean entities such as the Korea Mining Development Trading Corporation and Green Pine remain active in Iran. Intelligence reports in 2024 and 2026 confirmed that North Korean technology was used in Iranian missiles fired at Israel and American facilities in the Middle East.
North Korean specialists still supply tunnel-construction expertise, guidance upgrades, and components. Iran pays with oil shipments and hard currency that sustain the Kim Jong Un regime. The flow continues because secondary sanctions on Chinese banks, shipping companies, and front entities remain unevenly enforced.
In 2018, the Singapore summit between President Donald Trump and Kim Jong Un yielded a joint statement promising new relations and denuclearization. It included no timelines, verification, or enforcement. Sanctions pressure eased in practice. The international community redirected attention toward criticizing Israel’s self-defense while treating North Korea as contained.
Iran’s nuclear breakout timeline shortened in part because its primary supplier faced no decisive pressure.
The approach peaked on June 30, 2019, when Trump crossed into North Korea at the Demilitarized Zone, shook hands with Kim, and declared the threat managed. Nevertheless, Pyongyang continued testing and transferring its nuclear and missile capabilities. Iran’s nuclear breakout timeline shortened in part because its primary supplier faced no decisive pressure.
Strategically, the arrangement serves interlocking interests. North Korea secures revenue essential for regime survival amid isolation. Iran obtains standoff weapons that project regional power without conventional superiority. The axis exploits divisions among Western allies, tests nonproliferation norms, and enjoys quiet tolerance from China and Russia, which see the trade as a low-cost buffer against American influence in a vital region.
Real policy must strike the head of the snake: aggressive secondary sanctions on facilitating banks, naval interdiction of smuggling ships, cyber disruption of proliferation nodes, and sustained pressure on Pyongyang itself. Until the United States and the broader West treat North Korea as the central enabler, rather than a peripheral nuisance, efforts against Pyongyang’s clients will fail.
