Or the availability of inexpensive commercial drones may correlate with the trend they are describing. https://www.smithsonianmag.com/air-space-magazine/keep-y

Or the availability of inexpensive commercial drones may correlate with the trend they are describing. https://www.smithsonianmag.com/air-space-magazine/keep-your-drones-away-military-base-180964451/ https://www.smithsonianmag.com/air-space-magazine/keep-your-...