It's a national stage for Iowa's corn growers on Sunday

Looks like a beautiful day is expected weather-wise on Sunday for what has become an annual tradition: The Iowa Corn 300 at the Iowa Speedway:

Iowa Corn 1

It's always a great national and international stage to help people understand the story of Iowa's corn growers and ethanol so Bob headed out to learn more on today's Big Show:

Corn 2

Check it out here:

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