A police forensics officer takes photographs inside a cordoned off area in Woolwich, east London, on May 22, 2013. Two men wielding knives butchered and beheaded a man believed to be a British soldier... more 

A police forensics officer takes photographs inside a cordoned off area in Woolwich, east London, on May 22, 2013. Two men wielding knives butchered and beheaded a man believed to be a British soldier in a busy London street, before delivering an Islamist tirade to passers-by less