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Next airing Thu Sep 10, 5 a.m. ET

Fat

Humans across the globe are getting heavier, and in the United States two-thirds of the population are overweight. For some, beauty norms about size are changing, but for others, the sight of fat is still taboo. In Pennsylvania, we meet a man who has been eating himself to death. At 650 pounds, he can no longer move on his own.

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