Watch Unmanned: America's Drone Wars | Prime Video
The truth about Obama's indiscriminate and bloody drone war | Dangerous Minds
War games: Documentary shows how US recruited gamers to fly drones into Pakistan
Drone War Vietnam a book by David Axe
DRONE is a documentary about the CIA's drone war, it will be shown for the first time to the public at the VUB on the 22nd of April. (event link in comments) :
Drone review – a cool-headed doc about killing by remote control | Documentary films | The Guardian
Unmanned: America's Drone Wars - The Documentary Network