The next would-be assassin may be a drone pilot. US law enforcement doesn't look ready.
Briefly

"Nobody is really doing countermeasures against drones," one private security leader warned. Drones are not only prevalent, but also highly adaptable for violent purposes.
"It is the easiest thing in the world to hook a small piece of explosive to a drone, and send it over an event," explained Kent Moyer, emphasizing the alarming simplicity of the threat.
Drones have become a preferred weapon for various extremist groups, capable of causing significant harm during public events where politicians gather.
The inadequacy of existing protective measures against drones heightens the risk for politicians, as security agencies scramble to adapt to this modern threat.
Read at Business Insider
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