The preeminent documentary artist of America's Great Depression, Dorothea Lange considered conviction, propaganda, and faith to be intertwined, and her classic 1930's photographs for the Farm Security Administration, at once bluntly factual and deeply sympathetic, put a face on the rootlessness, isolation, and humiliation of poverty, while managing to convey a fundamental strength of American character - a resilience, faith, and determination, even in destitution, that shocked the national conscience.