May 8 and 9. 7:00pm. Waterloo Center for the Arts. Learn more about homeless people and their everyday struggle to survive by attending "The Invisible People--Begging to Be Heard," a theater production based on true stories of homeless people in the Cedar Valley. Tickets are $15. Doors open at 6:00pm; production begins at 7:00pm. The event includes a silent auction. Proceeds will benefit the Cedar Valley Hospitality House, a day shelter in downtown Waterloo. For reservations call 319-234-1311.