Roger Waters takes on the big issues of life in a genre new to him: an opera, set during the French Revolution. The result, "Ca Ira," arrives in stores Sept. 27 from Columbia/Sony BMG Masterworks. Rea

Roger Waters takes on the big issues of life in a genre new to him: an opera, set during the French Revolution. The result, "Ca Ira," arrives in stores Sept. 27 from Columbia/Sony BMG Masterworks. Read Anastasia Tsioulcas' column.