If you look at a map of American energy, all roads — or, more accurately, most pipelines — lead to Cushing, OK. It’s referred to as the “Pipeline Crossroads of the World.”It’s where much of the nation’s crude gets measured, traded, and sent out to the refineries that turn it into the fuel that runs the economy, which makes it this country’s commercial hub.Right now, Cushing is hovering near its “tank bottom” at approximately 20 million barrels. In the oil industry, that number is a red line. Once the hub dips below that threshold, according to oil analysts, we aren’t ...