BERLIN (Reuters) - The father of a victim of a neo-Nazi gang that waged a killing spree across Germany broke down on Monday as he appealed for the street on which his son was murdered to be named after him. Revelations in November 2011 that the cell was behind the previously unconnected murders of eight ethnic Turks, a Greek and a policewoman provoked deep soul-searching over how the so-called National Socialist Union (NSU) could have gone undetected in Germany for so long. ...