CNN — Police in Germany have launched a criminal investigation into Roger Waters, the co-founder of Pink Floyd, after he appeared dressed in a costume resembling a Nazi uniform during two concerts in Berlin last week. Waters was wearing the costume while performing from Pink Floyd’s 1979 concept album “The Wall,” in which the album’s protagonist hallucinates that he is a fascist dictator. The satirical routine has been a part of Waters’ solo shows for at least 30 years, including a famous live performance of the album in Berlin in 1990. This week appears to be the first time the...