water cannon, stun grenade, in Cape Town. 水炮, 閃光彈

People taking part in a protest against poor sanitation run away from a water cannon and stun grenades fired by members of the South African Police Services in Cape Town.
February 27, 2014  http://www.voanews.com/media/photogallery/february-27-2014-day-in-photos/1860702.html
Stun grenade - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Stun_grenade
閃光彈 - 維基百科，自由的百科全書
http://zh.wikipedia.org/wiki/%E9%97%AA%E5%85%89%E5%BC%B9
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