"Drone Attack on Saudi Oil Field Seen as Realizing Worst Fears...The risk is hardly new, though, for law enforcement and homeland security officials. FBI Director Christopher Wray in October warned a Senate committee that civilian drones pose a “steadily escalating threat.” The devices are likely to be used by terrorists, criminal groups or drug cartels to carry out attacks in the U.S., he said..."

"Drone Attack on Saudi Oil Field Seen as Realizing Worst Fears...The risk is hardly new, though, for law enforcement and homeland security officials. FBI Director Christopher Wray in October warned a Senate committee that civilian drones pose a "steadily escalating threat." The devices are likely to be used by terrorists, criminal groups or drug cartels to carry out attacks in the U.S., he said..."

https://finance.yahoo.com/news/drone-attack-saudi-oil-field-192155398.html