On April 8, the moon’s shadow will cut a swath across North America, from Mazatlán in Mexico and then across the United States, Texas to Maine, all the way to Newfoundland in Canada. In towns and cities in the path of totality—where the moon completely blocks the sun—hotels are in high demand. Airlines are promoting flights that coincide with the eclipse, including special eclipse-viewing charter flights. Millions of Americans near the path of totality are expected to hit the road to witness the first eclipse to cross the continent coast-to-coast…