Labor Day brings an unofficial end to summer and a well-deserved focus on the people who keep the wheels of commerce turning. Monday we're going to look at the world of work from the perspective of those not working. In Ohio, that's 11.2% of the work force. In a special presentation called "Looking for Work: A History of Unemployment" the producers of BackStory examine joblessness over the years and how it's shaped American lives and brought change to the social and economic landscape. Join us Monday at 9:00 a.m. The Sound of Ideas returns Tuesday.