I never understood why the USA never developed the fast train like Europe did in the last 30 years. I am not talking about for crossing East/West of course but rather for traveling North/South on each coast. If there was a fast train going from Miami to Boston in 7 hours, stopping just in big cities like Washington, Baltimore and New York (same on the west coast) a lot of people would take the train and that will drastically reduce the air lines congestion. In addition a train is not dependent on weather condition and cannot be rerouted to the World trade center. Also trains go from city center to city center.