In the narrow waters of the Strait of Hormuz — where a third of the world's seaborne oil passes and two adversaries maintain constant, uneasy presence — Iran announced Tuesday that its forces had seized an American unmanned underwater vehicle. The claim, unverified by Washington, adds another chapter to a long history of confrontations in a waterway where the margin between routine operation and international incident has always been dangerously thin. Whether provocation or misunderstanding, the episode reflects a deeper truth: when rivals share confined waters without shared communication, th