Customers shop for Christmas ornaments at a Walmart store in the Porter Ranch section of Los Angeles

Customers shop for Christmas ornaments at a Walmart store in the Porter Ranch section of Los Angeles

Customers shop for Christmas ornaments at a Walmart store in the Porter Ranch section of Los Angeles November 26, 2013. This year, Black Friday starts earlier than ever, with some retailers, including Wal-Mart, opening early on Thanksgiving evening. About 140 million people were expected to shop over the four-day weekend, according to the National Retail Federation. REUTERS/Kevork Djansezian (UNITED STATES – Tags: BUSINESS)