The best/most difficult for last. HSR, of course, is not a new concept but in America (see the movie Singles), but it's yet to really grip the imagination. It should and will. The New York Times characterizes it as a project "inching" along, one that's costly and difficult to sell to taxpayers but one that will ultimately change long-distant travel and, with any luck, save the planet. It will be a generation or two until airplanes are phased out, if ever, but trains should eventually outpace air travel as it's 1) a better experience for customers, 2) safer, 3) cheaper if run on alternative fuels. Let's make this happen, folks.