DAY 4 Katie had the day off to spend with us. We walked quickly to the train station to make the last bullet train to San Francisco. It's a relatively quick trip, but you shouldn't call any train a bullet, unless it averages 175 mph. Just saying. We really had no plans for the day except to wander the city. Again, that's what I call a vacation. Plan for the unplanned. Scott and Katrina had been here before, but it was my first time. I didn't realize there were so many different forms of public transportation here. I like that they still use all the old cars from other cities. This one was the Twin Cities one. It's also kind of sad that all these cities don't use them anymore. These PCC cars were from the last decade of the Twin City Lines' existence Since they were in very good shape, they were sold to far-flung places like Mexico City and Newark. The cars that now ride along Market Street were sent from New...