In his memoir, Brian Castner comes right out and tells you he’s crazy. Castner was the leader of a bomb disposal team in Iraq, a gory, dangerous job. But he never considered what life would be like when he got home. So to try to figure out who that crazy person was, he started writing. His 2012 book is the basis for an opera that’s being performed in Salt Lake City. Thursday, Castner and others join us to talk about the costs of war, and how you make art out of an experience like that.