Guardian: A freshwater channel that separates Michigans upper and lower peninsulas is a premier midwestern tourist attraction and a photographers delight, offering spectacular vistas of two Great Lakes, several islands and one of the worlds longest suspension bridges.
But nowadays the straits of Mackinac is drawing attention for something that is out of sight and usually out of mind, and which some consider a symbol of the dangers lurking in the nations sprawling web of buried oil and natural gas pipelines....