As bombs fell on the capital, a Bengal tiger was left all alone " until a US marine shot it. Rajiv Joseph explains why he brought the beast back from the dead for his Pulitzer-nominated drama A play that dramatises the thoughts of a tiger on the bombed-out streets of Baghdad sounds outlandish. But Rajiv Joseph's drama is rooted in a real incident during the invasion of Iraq. "I read the story," he says, "that detaile…