The Thule Air Base Broken Arrow incident. On Jan. 21, 1968, a B-52G Stratofortress belonging to the 380th Strategic Bomb Wing from Plattsburgh Air Force Base, New York, crashed in in Greenland in what is remembered as the second “Broken Arrow” incident (yes, that codeword is not only used in movies). The bomber, using radio … Continue reading On This Day in 1968 A B-52 Crashed in Greenland With Four Hydrogen Bombs