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Store employees Tyler Hutch Hutchinson, left, and Eric Halgren stock shelves at an Amazon Go store, Monday, Jan. 22, 2018, in... A shopper scans an Amazon Go app on a cellphone while entering an Amazon Go store, Monday, Jan. 22, 2018, in Seattle. The art... A customer reaches for a Just Walk Out Shopping mug at an Amazon Go store, Monday, Jan. 22, 2018, in Seattle. The store, whic... A customer looks overhead in an Amazon Go store, where sensors and cameras are part of a system used to tell what people have... As an Amazon Go worker, left, looks on to offer assistance, Tadeo Klappenbach, center, uses an Amazon Go app just put on his ... Amazon employees, who declined to be identified, and friends gather for a selfie inside an Amazon Go store, Monday, Jan. 22, ... A customer scans his Amazon Go cellphone app at the entrance as he heads into an Amazon Go store, Monday, Jan. 22, 2018, in S... Customer Paul Fan shops at an Amazon Go store, Monday, Jan. 22, 2018, in Seattle. The store on the bottom floor of the compan... Sensors and cameras, part of a system used to tell what people have purchased, are attached overhead as shoppers walk below, ... Amazon employee Krishna Iyer shows off an Amazon Go app as he shops in the store, Monday, Jan. 22, 2018, in Seattle. The stor... A customer is handed a complimentary shopping bag as he heads into an Amazon Go store, Monday, Jan. 22, 2018, in Seattle. Mor...