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29 Aug, 2014
Heavy-handed police tactics to break up riots in Ferguson, Missouri caused outrage, but new technologies designed to disperse protesters safely are not without controversy.
rubber bullet: đạn cao su
sting ball grenade: lựu đạn cao su
water cannon: vòi rồng
tear gas: hơi cay
pepper spray (Mason OC- Oleoresin Capsicum): bình xịt hơi cay
sonic blaster (long range acoustic device)
active denial system (a microwave beam causing painful but supposedly harmless heating)
dialogue police
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