Amazon said Tuesday it received regulatory approval to begin flying a smaller, quieter version of its delivery drone, the latest step in its long-running efforts to get the futuristic program off the ground.The company unveiled the new drone, called the MK30, in November 2022. It said then that the MK30, in addition to the other changes, would fly through light rain and have twice the range of earlier models.Amazon said the Federal Aviation Administration's approval includes permission to fly th...