[There an extra subject at the end of this. It has nothing to do with the main subject, but needed to be mentioned this week.] Before Thursday, I had never attended any ceremony at Arlington National Cemetery. On that day, we went to Arlington for the inurnment of the ashes of a great friend, colleague, and teacher, Robert Carleson. I’ve written about Bob before, and any reader can find several find obituaries on him from months ago, when he died. Suffice to say, Bob did more for the long-term well-being of the United States than many who have served as...