Originally, I heard they were mapping out gun owners homes by using drones in a grid pattern and going county to county.  Then I heard the govt lost either a nuke or nuclear material and the drones were especially equipped to search for the super sparklies.  Not sure what to believe, but that was a fuck load of drones flying over CO that everyone (FAA, Miltary, police...) denied knowledge about either the purpose or origin of the drones.