What’s the art coming after 9/11 look like? “Artists are apt to weigh in early and often on great national traumas, of course, but at times the most memorable works — the ones that last past the generation that actually experienced the catastrophe — come along some years after the event. It’s as if painters and poets and filmmakers need time to let it all sink in, to let the meaning of a great national tragedy slowly push its way past the sentimental cliches and the creaking platitudes, like a patient commuter at a rusty turnstile.”