They used to say that all roads lead to Rome. Now they all seem to lead to Louisville, whether you're starting from the desert or up the road in Florence, Kentucky. Some of us, even so, still miss the forgotten turnpike long favored by horsemen of the old school. In fact, there are times when I fear that we might actually have found ourselves on the road that is notoriously paved with good intentions. Saturday opens the third cycle of rehearsals offering starting points for the GI Kentucky Derby. The...