On the way back from the Flint Hills, I heard on the radio news that more than three-quarters of Europe's flights will be grounded tomorrow due to volcanic ash and that the problem may continue for "days or weeks." The newscast also said that "travel chaos" existed due to the groundings. And, that chaos exists even with Europe's enviable network of high speed passenger trains. I wonder how many Americans realize exactly the same thing will (not "could," given enough time "will") happen here. A map of potentially active volcanoes in the U.S. is here . California's is below. Alaska has the greatest number of volcanoes. Will travel chaos reign in the U.S. when one of these erupts? You betcha! Remember, the winds blow from west to east. So, the ash from any of these will cover most of the rest of the the U.S. (and, perhaps, parts of Canada and Mexico), grounding a tremendous number of flights. While the U.S. has a great network of ...