My new book "Blackout Warfare" warns that drones or unmanned aerial vehicles (UAVs) can be used to black out national power grids. Now, according to an FBI and DHS memo recently reported in the press, in July 2020 a drone made a failed attack on the Pennsylvania electric power grid. The drone, trailing electrical conductors intended to short out high-voltage powerlines at a transformer substation, crashed on a roof before reaching its target.