And wires in the air. Together they form the interstate natural gas pipelines and the electric transmission grid. When the talk turns to deregulation, whether on the gas or the electric side, the pipelines and the transmission grid are almost always voted "most likely to." That is, to remain regulated monopolies (em with cost-of-service rates protected by the Federal Energy Regulatory Commission (FERC).
Let's have a look at that idea.
The FERC has unbundled gas commodity sales from pipeline transportation.