"This 70-page report documents the struggles of foster care youth who become homeless after turning 18, or "aging out" of the state's care, without sufficient preparation or support for adulthood. California's foster care system serves 65,000 children and youth, far more than any other single state. Of the 4,000 who age out of the system each year, research suggests, 20 percent or more become homeless." (Quoted from site)