Hello.
There's a passage I can't understand in this video by BBC WORLD
SERVICE:
http://www.bbc.com/news/world-us-canada-30157393Can you help me, please? I've emphasized the obscure phrase with
capital letters: I'd like to know what the actual words are - as mine are
just a reconstruction.
It's around 01:00. The speaker says:
"and that causes authorities another problem: THE STONE DRONES
can now be blocked."
Thank you