Terrorists will take note, and start using drones to take out passenger aircraft. Someone bent on an attack might have been able to guide the drone into the aircraft. Heck, maybe this was a dry run...
“Terrorists will take note, and start using drones to take out passenger aircraft”
Since large airplanes have very stable approaches it is trivial to take one out using a drone. Terrorists no doubt know this and the Obama administration is pushing the FAA to allow drones of all kinds.
Another huge worry is the use of drones to deliver anthrax or dirty bomb materials into a crowded city, or to deliver poisons into water reservoirs, or to deliver explosives to start fires in forests or cities.