About 4 years ago my husband and I were traveling home from a fishing vacation in Ontario, Canada. We had just crossed the border about 20 - 30 minutes beforehand, and saw what could only be described as a “drone” flying in the air about 200 feet from our truck. Since this was in an area of Minnesota where there wasn’t a human soul for MILES around, I can only assume that this was US military equipment.
Folks, I would not be surprised to find out that the government has been patrolling with drones (at least the borders) for years.
IIRC the border patrol acknowledges one on the northern border, and a couple on the southern.