Back Accident de Thule Catalan Thulegate Czech Thuleulykken Danish Absturz einer B-52 nahe der Thule Air Base 1968 German Accidente de Thule Spanish Thulen lento-onnettomuus Finnish Accident de Thulé French התקרית הגרעינית בגרינלנד HE チューレ空軍基地米軍機墜落事故 Japanese Vliegtuigongeluk bij Thule (1968) Dutch
 A B-52G, similar to the one that crashed at Thule Air Base | |
| Accident | |
|---|---|
| Date | 21 January 1968 |
| Summary | In-flight fire leading to crew ejecting |
| Site | 7.5 miles (12.1 km) west of Thule Air Base (formerly Pituffik), Greenland 76°31′40″N 69°16′55″W / 76.52778°N 69.28194°W[1] |
| Aircraft | |
| Aircraft type | B-52G Stratofortress |
| Operator | 380th Strategic Bomb Wing, Strategic Air Command, United States Air Force |
| Registration | 58-0188 |
| Flight origin | Plattsburgh Air Force Base |
| Stopover | Baffin Bay (holding pattern) |
| Destination | Plattsburgh Air Force Base[2] |
| Crew | 7 |
| Fatalities | 1 |
| Injuries | 0 |
| Survivors | 6 (all excluding one crew member) |
On 21 January 1968, an aircraft accident, sometimes known as the Thule affair or Thule accident (/ˈtuːli/; Danish: Thuleulykken), involving a United States Air Force (USAF) B-52 bomber occurred near Thule Air Base in the Danish territory of Greenland. The aircraft was carrying four B28FI thermonuclear bombs on a Cold War "Chrome Dome" alert mission over Baffin Bay when a cabin fire forced the crew to abandon the aircraft before they could carry out an emergency landing at Thule Air Base. Six crew members ejected safely, but one who did not have an ejection seat was killed while trying to bail out. The bomber crashed onto sea ice in North Star Bay,[a] Greenland, causing the conventional explosives aboard to detonate and the nuclear payload to rupture and disperse, resulting in radioactive contamination of the area.
The United States and Denmark launched an intensive clean-up and recovery operation, but the secondary stage of one of the nuclear weapons could not be accounted for after the operation was completed. USAF Strategic Air Command "Chrome Dome" operations were discontinued immediately after the accident, which highlighted the safety and political risks of the missions. Safety procedures were reviewed, and more stable explosives were developed for use in nuclear weapons.
In 1995, a political scandal arose in Denmark after a report revealed the government had given tacit permission for nuclear weapons to be located in Greenland, in contravention of Denmark's 1957 nuclear-free zone policy. Workers involved in the clean-up program campaigned for compensation for radiation-related illnesses they experienced in the years after the accident.
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