Two gunmen drawing on each other in the middle of town was actually a rare occurrence in the American west. Still, it did happen, and most historians agree that the first example came July 21, 1865, and involved one of the west’s most famous gunfighters.
The first class of nuclear submarines were a learning experience for the Soviet Navy. The November class boats experienced numerous difficulties and accidents, culminating in what has been described as a potential “Underwater Chernobyl."