Although history cannot be undone, we can experiment with the question: What if World War I never happened?
Arizona students to participate in earthquake drill
More than 35,000 Arizona school students will take part in a multistate earthquake drill on Thursday morning.
People in California, Idaho, Nevada, Oregon, Utah and Washington will also take part in the drill. KJZZ's Dennis Lambert discusses the drill and the reasons for it with Michael Conway of the Arizona Geological Survey.