(FILES) This file photo taken on August 17, 2015 shows a Walmart sign in Miami, Florida. Discount retail giant Walmart updated investors on August 17, 2017 on its latest gadgets and time-saving options aimed at luring shoppers away from arch-rival Amazon, but the efforts come at a cost. The good news? The company's array of investments in e-commerce, store beautification, low prices and higher employee pay are indeed driving higher store traffic and sales.The bad news? Profits fell sharply due to the increased cost of those efforts. / AFP PHOTO / GETTY IMAGES NORTH AMERICA / JOE RAEDLE
Wal-Mart Stores Inc has opened a new front in its battle with Amazon.com Inc.
The world’s largest retailer has applied for a US patent for a floating warehouse that could make deliveries via drones, which would bring products from the aircraft down to shoppers’ homes.
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