Palomares incident: A B-52 bomber collides with a KC-135 Stratotanker over Spain, killing seven airmen, and dropping three 70-kiloton nuclear bombs ne...

Palomares incident: A B-52 bomber collides with a KC-135 Stratotanker over Spain, killing seven airmen, and dropping three 70-kiloton nuclear bombs near the town of Palomares and another one into the sea.