Possibly is a temporary measure but it will be applied until it will exist a save operating mode for drones over densely populated areas and also in urban settings. There was some accidents in the past. Last September a drone that caused a disturbance when it flew over the Mount Rushmore National Memorial amphitheater in South Dakota. Another, some months later, crashed in the Grand Canyon National Park in Arizona and other various critical situations were reported. „We have serious concerns about the negative impact that flying unmanned aircraft is having in parks, so we are prohibiting their use until we can determine the most appropriate policy that will protect park resources and provide all visitors with a rich experience“, said Jonathan Jarvis, director of the National Park Service when he signed the policy memo into effect a few days ago. Now. individuals flying drones in national parks may face six months of imprisonment and/or a $5,000 fine. According to some commentators, at this time something is however confusing people because different statements issued by different parks administrations are not very clear about what counts as a drone. At the same time, The Federal Aviation Administration has effectively banned commercial use of drones but this is another discussion, regulations are attempted possibly in the years to come.