“Greenland’s strategic importance has always been a trade-off: the island’s location is superb for early warning and global reach, but it also means that accidents are long, expensive, and politically hot problems. No incident illustrates this trade-off better than the loss of a nuclear-armed B-52 in 1968 near what was then Thule Air Base, an accident that combined high-strategic deterrence with makeshift Arctic solutions, and which has been haunted ever since by a missing piece of a nuclear weapon.”
The bomber, a B-52G flying an airborne alert mission as part of Operation Chrome Dome, was part of a network intended to keep nuclear strike aircraft constantly moving so that a surprise attack could not remove the leadership of the force from the ground. At times, 12 armed bombers were in the air. The remembered list of equipment for one crew member “toothbrush, mouthwash, surgical needle, catgut, and a flask of whisky” suggested the marathon quality of such missions and the expectation that crews might have to solve problems without landing.
In the Thule incident, the “problem” began with heat. Foam seat cushions near a heat source ignited, smoke filled the cockpit, and the plane’s electrical system malfunctioned. Six of the seven crew members survived by bailing out over the ice; one did not. The unmanned bomber went on to hit the ice west of the base, creating what one source called a 160-foot gash in the bay.
The weapons on board did not create a nuclear explosion. They did, however, detonate their conventional high explosives on contact, scattering radioactive materials over ice used for hunting and fishing by locals. Decontamination efforts Operation Crested Ice became a race against the clock: the sea ice would not remain solid, and debris could not be allowed to drift on meltwater into the bay. Ice roads were constructed, and collection and decontamination lines operated around the clock, as well as manual sweeping of the area in large patterns to capture pieces ranging from large structure to small hardware. The magnitude was straightforward: over 550,000 gallons of radioactive waste were transported to the United States for disposal.
This act did not balance the ledger. Despite the passage of months scavenging and hauling, there was no explanation for the missing crucial component of one of the four weapons: the thermonuclear “secondary,” also known as the “marshal’s baton.” This classified evaluation later followed: “No parts of the fourth secondary have been identified.” This search extended beneath the surface as well, including the use of a small submersible.
The engineering lecture was not only about blast-resistant containers or arming safety measures; it was about systems thinking. Airborne deterrence integrated flight endurance, refueling restraint, crew survival gear, and the knowledge that any crash could be quickly cleaned up to prevent any long-term ecological or political fallout. When this failed, it required new safety efforts, such as the subsequent emphasis on insensitive high explosives that minimized the possibility of a catastrophic detonation in the event of an accident.
The role of Greenland did not diminish after the Chrome Dome program ceased. It is the same geography that made Thule a location for “monitoring” during the bomber era that underpins missile warning and space surveillance. The base, now called Pituffik Space Base, is home to U.S. forces operating radar related to early warning and tracking.
The 1968 crash is the most vivid reminder that Arctic basing is more than just what technology can accomplish at the top of the world. It is also a matter of what happens when things go wrong at the top of the world and how much of the problem stays behind when the boxes of contaminated ice are carted off.
