Given the state of the current economy, a growing number of Americans with ordinary lives are choosing to scale down — way down. They call themselves the “tiny house” movement. Need to Know visited one of the movement’s proponents, Dee Williams, at her small home in Olympia, Wash. Her home measures 84 square feet, has a small sleeping loft, a compost toilet and enough closet space for a few shirts and pairs of pants. Williams says the downsizing has brought her a sense of contentment, and many others are beginning to follow her lead.