Civilian drones are making the skies more congested than ever before, and with it, the increase of incidents involving drone have developed in several countries. The UK Airprox Board, which monitors safety issues in British airspace, identified 56 air proximity incidents involving drones since last year. Meanwhile in the U.S, 583 drones incidents have take place between August 2015 and January 2017. Most of them were minor incidents, but others have been in airport airspace.