I've been up north, as we say in this state, for the last week, on Lake Michigan about fifty miles from the Straits of Mackinac. Fifty miles, that is, from Line 5, the oil pipeline – actually, twin pipelines -- under the straits. There has been a lot of concern about Line 5 in recent years. People have suddenly discovered the existence of the line, which can carry as much as 540,000 barrels of light crude oil and liquid natural gas a day, pumped at high pressure under the lakes. (Read more: What