In the world of railway enthusiasts and modelers, freight carriers are every bit as technically involved and evocative as engines and cabooses. This color gallery pictures and describes, well, a trainload of "rolling stock"--boxcars, flatcars, hoppers, gondolas, tank cars, auto-rack transports and others--representing a variety of railways in action around the nation. Engines may provide the power and cabooses the sentimetal value, but without that which comes in between, both are moot.
