REVIEW: Substitute steps in to conduct thrilling ‘Zarathustra’ with CSO

When a rising conductor is called upon to step in at the last moment to perform with a major orchestra, there’s always a sense of drama. In the case of the 27-year-old American conductor Maurice Cohn, who led the Cincinnati Symphony Orchestra on Friday, the drama involved more than just leading a sensational work that is part of the orchestra’s DNA – Richard Strauss’ “Thus Spake Zarathustra.”