Spy drones used in US: FBI

Unmanned drones are roaming American skies conducting surveillance on people in the United States, albeit in a "very minimal way," the head of the FBI revealed to Congress on Wednesday.
Federal Bureau of Investigation director Robert Mueller said his agency's use of a small number of aerial drones is relatively new, and that the bureau has only begun to draw up policy and operational guidelines for the devices.
Mueller said the drones conduct surveillance, but that they were "seldom" used.
Other agencies are known to be using the high-technology gadgets, including the Department of Homeland Security, which uses drones to patrol the US border with Mexico.