Police in Germany have launched an investigation into Pink Floyd co-founder Roger Waters after he fired an imitation machine gun while wearing a Nazi-inspired uniform at a concert in Berlin. The British bassist and singer was filmed wearing a long black coat and red armband - featuring crossed hammers instead of swastikas - as he pretended to shoot the fake weapon during a skit between songs. Germany has strict rules against the use of Nazi imagery - punishable by up to three years in prison - although its laws do allow exceptions for artistic or educational reasons. Video clips and...