This reads like a UFO hysteria report. "10 ft drones that make no sound and hover in the air for hours at a time" Do drones like this even exist that are avail

This reads like a UFO hysteria report. "10 ft drones that make no sound and hover in the air for hours at a time" Do drones like this even exist that are available to civilians? Even $30,000 commercial grade drones are only a few feet wide and have sub hour flight times.