In the news just now, I heard that from tomorrow, all visitors to the US must comply with this Homeland Security thing by having machine readable passports. The EU started using these in the early 1990s. I was one of the last people to have the old type.
Government advice here to folks visiting the US:
http://www.dhs.gov/us-visit <- I scanned this site for "trains" but found only advice about not taking explosives aboard trains. Hmmm, I'll remember that for next time.

J_A_B, you should come to the UK, where we have numerous restored steam railways. I could probably come up with a list of about 20. One of my favourites is the Swanage Railway -
http://www.swanagerailway.co.uk in southwest England. You can take all the pictures you want, ride on the trains, visit the signal boxes, get a ride on the footplate of a steam loco, and for an affordable price you can even learn about the trains and enjoy a driving experience, along with acting as fireman and "second man" - you get to uncouple the train at the end of the line, change the points to route the engine onto the parallel track and back up to the other end of the train. I've done that and it was hard work lifting those couplings off, and I got covered in grease!
When I first went to the Swanage railway in 2000, I thought the steam locos might be decrepit heaps of clanking old iron. That was not the case at all. The one hauling our train looked and sounded like a well oiled machine.