The US military has been experimenting with the use of drones for almost a century, but it’s only recently that technological advances have made unmanned aerial vehicles (UAVs) a game changer in warfare. Today, at least 79 countries field drones; 23 of those countries arm them. Earlier this year, VICE News was one of the first media outlets ever granted access to the US military's annual Black Dart exercise, a decade-old joint exercise that focuses on detecting, countering, and defeating UAVs.