pepper spray
Clashes erupt in U.S. west coast cities during May Day marches
May 02, 2015 07:05 AM EDT
Protesters chain themselves to Oakland police station doors
Dec 16, 2014 05:01 AM EST
Hong Kong protesters break into government building as tensions flare again
Nov 18, 2014 09:54 PM EST
Tensions surge in Hong Kong protests amid scuffles, signs of backlash
Oct 04, 2014 01:54 AM EDT
Hong Kong students brave pepper spray in clashes with riot police
Sep 26, 2014 10:59 PM EDT