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What scientists hope to learn from today's total solar eclipse

Derrick Pitts, chief astronomer and planetarium director for the Franklin Institute in Philadelphia, will observe the solar eclipse from St. Joseph, Missouri. It's within the 70-mile-wide path of totality. Pitts joins "CBS This Morning" from Rosecrans Memorial Airport to discuss what we can learn from the eclipse and why he'll be watching for "shadow bands."
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