In 1873, Arthur McCluskie was seeking revenge for the death of his brother two years earlier. He tracked down the killer, Hugh Anderson, in Medicine Lodge, Kansas, and challenged him to a fight. The date: July 4. The weapons: pistols. The combatants met in the main street and opened fire; both were wounded before they ran out of bullets. But they weren’t done. McCluskie and Anderson pulled knives and went at it. Both died from their wounds.