Former UK Chief of Staff Lord Dannatt has called for a ground invasion against Islamic State (ISIS) on Monday, claiming that the cultural and security impact of the group calls for an international armed effort to expand beyond the current airstrike campaign. "The capture and likely destruction of the 2,000-year-old Roman colonnades at Palmyra, Syria, by Islamic State constitutes a potential cultural crime on a gigantic scale," Dannatt wrote in the Daily Mail. "These majestic ruins represent thousands of years of human civilisation and there is now surely no doubting just how great a threat IS [ISIS - ed.] poses...