Reuters: Authorities are building a new containment boom to fight an oil spill in a major western Canadian river, officials said on Saturday, after the spill breached a previous barrier and threatened the drinking water of several communities along the coast. The city of North Battleford, which draws its drinking water in part from the North Saskatchewan River, shut its supply intake on Friday and switched to using ground water, provincial officials said in a telephone conference with reporters. Some 1,572...