Amazon makes in-store shopping checkout-free

Imagine running to the store, grabbing what you want, and walking out the door. No lines, no cashiers, no checkout counter.That concept has become reality in Seattle, Washington.Amazon launched “Amazon Go.”It's a convenience store that lets shoppers grab what they want and walk out.Here's how it works: Shoppers will scan their Amazon Go app before entering. Sensors will track shoppers' movements. The app will charge their Amazon account for the products they take.