It's leading to new fears that America's energy infrastructure is prone to attack and potentially being knocked offline, akin to the drone and missile attack which temporarily halted all Saudi oil exports last year at Aramco's Abaqaiq oil processing facility. Forbes presents the astonishing details as follows:
A TINY ARMADA OF BETWEEN FOUR AND SIX UNMARKED DRONES FLEW OVER THE PALO VERDE GENERATING STATION NUCLEAR POWER PLANT IN ARIZONA ON THE NIGHTS OF SEPTEMBER 29 AND 30, 2019, WITH PLANT SECURITY PROVING UNABLE TO STOP THEM AND AUTHORITIES STILL UNCERTAIN WHO WAS OPERATING THEM OR WHY.
The newly accessed Nuclear Regulatory Commission (NRC) documents had called the incident a "drone-a-palooza" as it involved swarms of inexpensive, likely off-the-shelf drones flying in large numbers over restricted airspace and near sensitive structures of Arizona's Palo Verde Nuclear Power Plant.
The documents conclude that it's still as yet unknown who or what entity sent them or who was operating them during the illegal incursion.