1968年美国图勒空军基地B-52坠毁事件 ，是一起发生在1968年1月21日的飞机坠毁事件，事件中一架美国空军 的B-52轰炸机 坠毁。这架B-52轰炸机携带了4颗氢弹 ，执行冷战 期间的鉻穹頂行動 北冰洋 的巴芬湾 时，因为机舱起火迫使机组人员在迫降前放弃飞机。6名机组人员成功脱险，但其中1名因为没有弹射座椅 ，在试图跳伞 时死亡。飞机随后坠入格陵兰島 西北部美軍圖勒空軍基地 附近的北极星海湾 ，导致4颗氢弹头破裂并扩散，产生大范围的放射性污染 。
美国 和丹麦 启动了一次集中清理和恢复工作，但其中一颗弹头未被找到。事發後美国战略空军的鉻穹頂行動 炸药 。
1995年，有报告揭发丹麦政府 有意对格陵兰的核武器事故保持缄默，这违反了1957年丹麦的无核区域政策。参与清理的工人因为核辐射 产生相关疾病，一直在寻求赔偿。2009年3月，时代杂志 认为这次事故是世界上最严重的一起核事故。
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