LONDON (Reuters) - The U.S. Navy's Fifth Fleet accused a Dubai-based ferry operator Tuesday of breaking U.N. sanctions by smuggling banned chemicals into Iraq that it said could be used to make high-grade explosives. It said the industrial-grade alcohol and polymers, which can also be used for industrial cleaning agents and cosmetics, could also be used to manufacture chemical weapons agents. Naif Marine Services had been caught shipping the chemicals aboard ferries it operates into Umm Qasr, close to the Kuwaiti border in recent months, said Fifth Fleet public affairs officer Lt. Garret Kaspar. "In the wrong hands, quantity aside,...