Two hours before the doors were set to open Friday morning, a Miami-area Wal-Mart parking lot was full of cars _ and possibility. But in a Christmas shopping season in which many Americans were unwilling to spend, even a packed lot doesn't always translate into holiday cheer for stores.
As stores offered rock-bottom prices and extended return policies, shoppers returned to the malls the day after Christmas. But many were on the hunt for big bargains on specific items or hoping...
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