Denmark Learned in 1996 of the U.S. Iceworm Plan Under Greenland

Key Takeaways

• Iceworm aimed to hide ICBMs under Greenland ice
• Camp Century housed PM‑2A nuclear reactor for 33 months
• Melting ice threatens release of 24 million litres radioactive waste
• Project revealed in 1996, straining US‑Denmark ties
• Legacy fuels debate on Arctic security and cleanup

Summary

In 1996 the United States disclosed Project Iceworm, a covert Cold War effort to build a nuclear‑powered missile base beneath Greenland’s ice sheet. The program’s proof‑of‑concept, Camp Century, operated a portable PM‑2A reactor for nearly three years before being abandoned in 1967 due to unstable ice and soaring costs. Decades later, melting ice is exposing thousands of litres of radioactive waste and diesel fuel left on site, raising fresh environmental alarms. The revelation also strained U.S.–Denmark relations and reshapes today’s Arctic security debate.

Pulse Analysis

Project Iceworm emerged from a Cold War calculus that prized distance, concealment, and rapid strike capability. By situating intercontinental ballistic missiles beneath the Greenland ice sheet, the United States sought a launch platform that was both hard to detect and within striking range of the Soviet Union. The secrecy surrounding the program, kept from Danish authorities until declassification in 1996, underscored the era’s willingness to sidestep diplomatic norms for strategic advantage, a lesson that still resonates in today’s Arctic power plays.

Technically, Camp Century represented a bold experiment in extreme‑environment engineering. The PM‑2A portable reactor supplied heat and electricity in temperatures plunging to ‑60 °C, proving that nuclear power could sustain remote outposts. Yet the dynamic nature of the ice sheet—continuous flow, crevassing, and surface lowering—proved fatal. Tunnel deformation, costly repairs, and logistical nightmares forced the abandonment of the project by 1967, leaving behind contaminated soil, diesel, and sealed waste drums. The failure illustrates the limits of engineering when natural systems are misunderstood.

Now, climate change is turning a Cold War relic into a modern crisis. Accelerated melt of Greenland’s ice is poised to release an estimated 24 million litres of radioactive sewage and 200 000 litres of diesel, threatening marine ecosystems and indigenous communities. This emerging threat has sparked calls for multinational remediation efforts and tighter regulation of legacy military sites. Simultaneously, the Arctic’s growing strategic value—driven by new shipping routes and resource claims—means that the Iceworm story serves as a cautionary tale about balancing security ambitions with long‑term environmental stewardship.