Nightline Podcast - August 2nd, 2011

In tonight's episode, personal tapes from Jaycee Dugard's captors reveal that they had been looking for other potential girls to kidnap. Then, a look at gluten-free eating, a dietary fad that has gone from treatment for a rare disease to full-on Hollywood hype. Finally, Sydney's shark attacks are on the rise, but hopefully with help from science, humans and these predators can coexist.

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