Making sense of the Iraq War on film, in rock music, and on-stage. The director Kimberley Peirce tells a hidden war story in “Stop-Loss.” The band Black 47 writes songs for a surprising fan base: combat soldiers. George Packer transforms his article on Iraqi translators into a stage play. Plus, songs and stories from Stew, the creator of “Passing Strange,” the new rock musical that’s revolutionizing Broadway.