ภาพคนอเมริกันแห่ช้อปปิ้ง Black Friday

People carry shoes in Macy's during Black Friday sales in New York, Nov. 27, 2014.

Shoppers crowd outside a store before it opens on Black Friday in Sao Paulo, Nov. 28, 2014.

Kelly Foley, left, Debbie Winslow, center, and Ann Rich use a smartphone to look at a competitor's prices while shopping shortly after midnight on Black Friday in South Portland, Maine, Nov. 28, 2014.

Shoppers compete for items on Black Friday at an Asda superstore in Wembley, north London, Nov. 28, 2014.

Shoppers line up outside Best Buy before the store opens in Newport, New Jersey, Nov. 27, 2014.

Customers wrap up their holiday shopping during Walmart's Black Friday events in Bentonville, Ark., Thursday, Nov. 27, 2014.

Protesters hold signs aloft outside Macy's before the kick off of Black Friday sales in New York, November 27, 2014.