Islamic State video purportedly showing the beheading of a man identified as British taxi driver Alan Henning emerged on Friday night.<br/> <br />The video on a social media website couldn't be independently verified by Reuters.<br/> <br />Henning was abducted when a convoy he was with taking medical supplies to a hospital in Syria last December was stopped by gunmen.<br/> <br />On Saturday the United Nations condemned Henning's killing.<br/> <br />(SOUNDBITE)(English) MARIA CRISTINA PERCEVAL, ARGENTINEAN AMBASSADOR TO THE UNITED NATIONS AND ACTING SECURITY COUNCIL PRESIDENT FOR OCTOBER, SAYING:<br/> <br />"The members of the Security Council strongly condemned the heinous and cowardly murder of Alan Henning, a volunteer British humanitarian aid worker, by the Islamic State of Iraq and the Levant (Islamic State). This crime is a tragic reminder of the increasing dangers volunteer humanitarian personnel face every day in Syria. It also once again demonstrates the brutality of ISIL which is responsible for tho
