Nearly 100 countries have military drones, and it's changing the way the world prepares for war

The number of countries with military drones has skyrocketed over the past decade, a new report revealed, showing that nearly 100 countries have this kind of technology incorporated into their armed forces.

In 2010, only about 60 countries had military drones, but that number has since jumped to 95, a new report from Bard College's Center for the Study of the Drone revealed.

Dan Gettinger, the report's author, identified 171 different types of unmanned aerial vehicles in active inventories. Around the world, there are at least 21,000 drones in service, but the number may actually be significantly higher.

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