I was taking the train to Bloomington last week for a class that I needed to attend. You meet a much different class of people in train stations than you do in airports. That's not to say that they are better or worse, just different. Many of them are college students or elderly people who don't have much money. There are more minorities than you meet on most airplanes. One thing that is nice about America is that there is a great deal of diversity. I think that is probably one of our biggest strengths. When a civilization stops changing, it begins to die. At least that seems to be what happened to every other empire in history.
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There was a middle-aged woman next to me traveling with her mother who needed a walker. The woman pointed to the clock and said to her mother, "Did you ever notice how most clocks have two hands for the hours and minutes, and then some clocks also have a third hand which is the second hand?". They must have talked about that for 3 or 4 minutes before the mother understood the joke. Listening to them was far funnier than the joke. I felt like I was next to Abbott and Costello.