Iranian naval forces have detected a US nuclear submarine in the Persian Gulf waters, amid growing concerns over the safety of one of the most important energy routes in the world. An Iranian patrol on Thursday spotted the nuclear-armed and -powered submarine in the strategic Strait of Hormuz, which allows the passage of 90 percent of the oil produced by Persian Gulf states to Asia, the US and Western Europe. There are currently 48 logistic and 18 combat US vessels in the Persian Gulf waters, among them the USS-Eisenhower aircraft carrier. Show Less >>