Dorothea Lange - An American Odyssey - YouTube: Before she even owned a camera Dorothea Lange started her visual odyssey in New York's Lower East Side with a passion for mingling with the common people on the street. Following a move to the West she became one of the great portrait photographers of San Francisco's upper crust. But when the Great Depression hit, she moved back to the streets, photographing destitute people.
Dorothea Lange (May 26, 1895 – October 11, 1965) was an influential American documentary photographer and photojournalist, best known for her Depression-era work for the Farm Security Administration (FSA). Lange's photographs humanized the consequences of the Great Depression and influenced the development of documentary photography. From: http://www.historyplace.com/unitedstates/lange/index.html