Final Countdown to Solar Eclipse

The countdown to the solar eclipse is hours away. While Philadelphia will see most of the sun covered, it is nothing compared to what those in the "path of totality" will witness. NBC News' Jay Gray is in Wyoming where 100 percent of the sun will be covered.

(Published Monday, Aug. 21, 2017)

The countdown to the solar eclipse is hours away. While Philadelphia will see most of the sun covered, it is nothing compared to what those in the "path of totality" will witness. NBC News' Jay Gray is in Wyoming where 100 percent of the sun will be covered.