When you hear the word, "tombstone," what comes to your mind? Do you think of a granite slab in a cemetery? You're obviously old. Besides, there aren't many tombstones any more. There are horizontal plaques buried in the ground. That's because of motorized lawn mowers. A motorized lawn mower with wide blades can't cut grass immediately around a tombstone. They can drive over plaques. Tombstones are high-maintenance memorials. The economics of lawn maintenance has cut down tombstones. Then there are those full-page ads in the Wall Sreet Journal. We don't see them as much any more. Back when there were...