Katie Couric makes documentary debut at Sundance

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Along with her soon-to-end daytime talk show, fall engagement and recent move from TV to the web as Yahoo's global anchor, Katie Couric also made a documentary shown at Sundance.

"Fed Up" premiered Sunday at the Sundance Film Festival. Couric produced and narrates the documentary, which explores the epidemic of childhood obesity and its not-so-obvious causes.

The 57-year-old reporter said documentaries "are replacing journalism in some cases" because budget cuts and a taste for quick news bites means "nobody invests the time to really investigate some of the biggest social issues." She said her documentary goes beyond the headlines to show the causes and costs of obesity in the United States.

Couric also plans to dig into social issues and talk with cultural leaders in her new gig at Yahoo.

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