GRATEFUL AMERICAN As a kid in suburban Chicago, Gary Sinise was more interested in sports and rock 'n' roll than reading or schoolwork. But when he impulsively auditioned for a school production of West Side Story, he found his purpose--or so it seemed. Within a few years Gary and a handful of friends created what became one of the most exciting and important new theater companies in America. From its humble beginnings in a suburban Chicago church basement and eventual move into the city, the Steppenwolf Theatre Company launched a series of groundbreaking productions, igniting Gary's career along with those of John Malkovich, Joan Allen, Gary Cole, Laurie Metcalf, Jeff Perry, John Mahoney, and others. Television and film came calling soon after, and Gary starred in Of Mice and Men (which he also directed) and The Stand before taking the role that would change his life in unforeseeable ways: Lieutenant Dan in the Academy Award–winning Forrest Gump. ...