I mean, China is not small either. In terms of doable, there is still a higher density of wealth per square mile in the U.S., even if the population density is less. But at any rate, you don't need to have the entire country be one high speed rail system. You could connect the West Coast from San Diego to Seattle, including L.A., S.F. and Las Vegas. You could do the same for the East coast. And you could have a Houston, Dallas, Austin circuit, among others. No need to do S.F. to NYC for passenger transport.