Members of Special Police Support Unit pose for photo in front of their base in central Bosnian town of Zenica, October 3, 2014. When the killing of an unarmed black teenager by a white policeman in Ferguson, Missouri, in August sparked sometimes violent protests, the response of police in camouflage gear and armoured vehicles wielding stun grenades and assault rifles seemed more like a combat operation than a public order measure. Some U.S. police departments have recently acquired U.S. military-surplus hardware from wars abroad, but there are many law enforcers around the world whose rules of engagement also allow the use of lethal force with relatively few restrictions. But for every regulation that gives police wide scope to use firearms, there is another code that sharply limits their use. In Bosnia, police are permitted to use force ranging from batons to chemical irritants, water cannon, "binding agents, special firearms and explosive devices", following a warning, but only when other methods of control have proved ineffective, and not against the young, old or disabled unless these use firearms. The method must be "proportional to the resistance or violence coming from the person on whom the force is used". Picture taken October 3. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: POLITICS CIVIL UNREST CRIME LAW SOCIETY PORTRAIT)

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