High-speed rail can be found around the world. Yet so far, the projects haven't tracked in the U.S., where both the public and private sectors have faced ballooning costs and delays. It's hard to exaggerate the role of the train in the American story or the romance of train travel, those iron horses galloping down tracks of steel. Why, then, has high-speed rail — so common in other countries — not tracked in the U.S.? An ambitiou... [12829 chars]