Ferguson. Sound canons. Flash grenades. Other strangeness.

[jakeXT]

10. They had them ready in 04 during the RNC

RNC to Feature Unusual Forms of Sound
Aug. 25, 2004
By Amanda Onion

Coming soon to a convention near you: Sound like it has never (or at least, rarely) been heard before.

As politicians at the Republican National Convention use microphones to make themselves heard from the podium, other sounds in and around the event will be emitted in cutting-edge audio technology.

Outside the convention hall, New York City police plan to control protesters using a device that directs sound for up to 1,500 feet in a spotlight-like beam. Meanwhile, a display of former Republican presidents inside the hall will feature campaign speeches that are funneled to listeners through highly focused audio beams.

http://abcnews.go.com/Technology/story?id=99472&page=1