Walmart on Monday filed a request with the Federal Aviation Administration to begin deploying commercial drones to transport goods from outside vendors to its distribution centers, as well as to customers’ homes. The company, which has been testing drones in indoor flights, wanted an exemption in order to deploy small unmanned aircraft systems, wrote Shekar Natarajan, Walmart vice president, logistics strategy, in a letter to FAA Administrator Michael Huerta. Its goal was to create a more efficient delivery system to move merchandise.