Shoppers Manuel Orellano, middle, with his daughter Marcela, left, and her son Manuel, 6, shop for children's clothing at JCPenney at Glendale Galleria shopping mall in Glendale, Calif, on Friday. Damian Dovarganes/AP hide caption
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Police are on guard as shoppers line up for a Black Friday sale at a Tesco store in Cardiff, Britain. Mattthew Horwood/EPA/Landov hide caption
Retailers' Black Friday ads and other parts of the holiday season are designed to tap into a very ancient part of our brains. Paul J. Richards/AFP/Getty Images hide caption
NPR producer Olly Dearden is a fan of most classic Thanksgiving dishes, but calls sweet potatoes topped with marshmallows a "culinary abomination." Stephen Little/Flickr hide caption
Festivalgoers browse for books during the Miami Book Fair International. PBS will provide live coverage of the fair's events over the course of three days this year. Roberto Schmidt/AFP/Getty Images hide caption
People enter Macy's Herald Square store after opening its doors at 8 p.m. on Thanksgiving Day in New York City. Kena Betancur/Getty Images hide caption
The scene at the registers in a Braintree, Mass., Target store on Black Friday. Allison Joyce/Getty Images hide caption
People waited in line to make purchases at a Macy's department store in New York during last year's "Black Friday" shopping weekend. Stan Honda/AFP/Getty Images hide caption
Buy more, or buy less, this holiday season; the choice is yours. Matt Cardy/Getty Images hide caption
Black Friday at Macy's in Manhattan: Shoppers lined up. Stan Honda/AFP/Getty Images hide caption
Shoppers wait to get inside of a Best Buy store on Nov. 25 in Naples, Fla. Spencer Platt/Getty Images hide caption
Shoppers crowd a Best Buy store at dawn on Black Friday. Spencer Platt/Getty Images hide caption