Scotty wants to limit the impact of potential threats from UAVs. What physical security control is best suited to this purpose?

Although actual threats from drones and unmanned aerial vehicles (UAVs) are relatively rare for most organizations, placing sensitive areas further inside a building will deter most current generations of drones from entering or recording them. Security doors and other common obstacles will prevent most UAV or drone penetration that typical organizations will face. Fences are easily bypassed by flying drones, biometric sensors won’t stop a drone from hovering outside of a window, and Faraday cages might stop a drone from receiving commands if you could get the drone inside first!