Melee at the Mall: America Goes Shopping

By Tom Hall - 2013-11-29T12:35:42Z

Photograph by Kena Betancur/Getty Images

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Flash Mob

The National Retail Federation has even issued crowd management guidelines, warning retailers of the perennial threat of angry consumers and flash mobs.

Left: Customers enter Macy's Herald Square as the store opens on Thanksgiving day in New York.

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