HALIFAX (CP) - A more powerful American navy tug took over the towing of a disabled Canadian submarine Saturday, moving up its expected arrival in Scotland to late Sunday. The tug Carolyn Chouest tied its tow lines to the HMCS Chicoutimi on Saturday, replacing the smaller British tug, the Anglian Prince, that made slow progress around the stormy northern tip of Ireland on Friday. "It's larger, faster and safer," Commodore Tyrone Pile, head of the Atlantic fleet, said of the American vessel during a news conference Saturday. Previously, navy officials predicted the salvage operation would not get the sub to...