The US Coast Guard has used cannon to sink a crewless Japanese ship that drifted to Alaska after the 2011 tsunami. The coast guard earlier said they would hold off scuttling the Ryou-Un Maru after a Canadian fishing boat claimed salvage rights. But a Canadian official later said that the Bernice C had been unable to tow the 200ft (61m) Japanese "ghost ship". The boat had no lights or power and was