Millions of people will tilt their heads skyward on Monday, marveling at a total solar eclipse. The moon will cross the sun and block its light for a few fleeting moments, a communal celestial experience that will not again be so accessible to people in the United States, Canada or Mexico for decades.
The total solar eclipse’s path — the expanse where the moon fully obscures the sun — stretches from Mexico’s Pacific Coast to the fringes of Atlantic Canada, passing through dozens of major cities where authorities are preparing for an influx of visitors eager to experience what may be a once-in-a-lifetime opportunity.
