Walmart will no longer carry Amazon's Kindle Fire in its retail stores. The retailer joins Target, who gave up on the Android-based device in May of this year. Walmart is still selling Barnes & Noble’s Nook as well as some other e-reader devices. Some think this move is in response to its own plans to launch its own e-commerce strategy, which it has apparently been working on for awhile. In other words, Amazon.com is a direct competitor and Walmart doesn't want a device tied to a competing e-commerce destination.