9/11 has been covered in pretty much any medium you can think of (poetry, movies, books, paintings, etc.). And now it gets the operatic treatment. The San Francisco Opera today announced the cast for "Heart of a Soldier," an opera from composer Christopher Theofanidis with a libretto by Donna DiNovelli. The new work, which is based on the book of the same name, tells the story of Rick Rescorla, the head of security for Morgan Stanley who died shepherding people to safety during the attack. It will premiere on September 10. And the more we think about it the more opera actually seems like a pretty natural fit for a story that still looms so large in the public's mind.