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UK OKs Taser Stun Guns for Some Police  NEW YORK/LONDON (Reuters) - The shares of stun gun maker  Taser International Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=TASR.O target=/stocks/quickinfo/fullquote"&gt;TASR.O&lt;/A&gt; soared on Wednesday after the  United Kingdom, which does not allow most police to carry guns,  said it approved use of its stun guns for some officers. 