Fiber-optic first-person-view drones are jam-proof. Sending and receiving signals along millimeters-thick but miles-long optical fibers, these FPV drones are impervious to the radio interference that can ground wireless FPV drones. That doesn’t mean it’s impossible to defeat a fiber-optic drone.
From Internet (not op):
Just need sissors and a pogo stick to bring one down.
Russians can just mark their location to make it easier.
Are they tethered to the operator?
So that’s where all of the USA’s fiber rollouts ended up