The Bahrain-based U.S. fleet continues to monitor the situation in the Persian Gulf. Over the past two years, Iran has attacked, interfered with or harassed the navigational rights of 15 internationally flagged commercial vessels, U.S. officials have revealed. Late last month, Iran’s state television showed footage of the country’s navy commandos in a helicopter operation boarding the Marshall Islands-flagged tanker Advantage Sweet. The Turkish-operated, Chinese-owned tanker was reportedly bound for Houston, Texas carrying Kuwaiti crude oil for U.S. energy giant Chevron Corp. (NYSE:CVX). Iran claimed that the tanker collided with an unidentified Iranian vessel hours prior to its seizure, with...