The Islamic State yesterday released a video showing the beheading of British aid worker, David Haines, who was abducted in Syria last year. Before he was executed, the father of 2 blamed British Prime Minister David Cameron for his death. He said;“My name is David Cawthorne Haines. I would like to declare that I hold you David Cameron entirely responsible for my execution. You entered voluntarily into a coalition with the United States against the...