What you need to know about the coming 'Great American Eclipse'

The U.S. is in for a rare astrological treat on August 21, 2017 — that's the day of the "Great American Eclipse." It's the first total solar eclipse to cross the entire U.S. in 99 years, and more than 12 million Americans live in its path.
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The U.S. is in for a rare astrological treat on August 21, 2017 — that's the day of the "Great American Eclipse." It's the first total solar eclipse to cross the entire U.S. in 99 years, and more than 12 million Americans live in its path.