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The Boston Globe

Business

Longtime secret recipes may have updated ingredients

ATLANTA — Coca-Cola keeps the recipe for its 127-year-old soda inside an imposing steel vault that is bathed in red security lights. Several cameras monitor the area to make sure the fizzy formula stays a secret.

But in one of the many signs that the surveillance is as much about theater as reality, the images that pop up on video screens are of smiling tourists waving at themselves.

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