Not to mention that (I recall reading a long time ago) a typical asteroid contains as much iron ore as is present in the Iron Range. And there are a whole _lot

Not to mention that (I recall reading a long time ago) a typical asteroid contains as much iron ore as is present in the Iron Range. And there are a whole _lot_ of typical asteroids. I'm a big fan of the High Frontier. We just gotta get out of earth's gravity well cheaply and easily.