History: The Great Depression By Dorothea Lange, 1939-1943, United States

With the onset of the Great Depression, Lange turned her camera lens from the studio to the street. Her studies of unemployed and homeless people captured the attention of local photographers and led to her employment with the federal Resettlement Administration (RA), later called the Farm Security Administration (FSA).
In December 1935, she divorced Dixon and married agricultural economist Paul Schuster Taylor, Professor of Economics at the University of California, Berkeley. Taylor educated Lange in social and political matters, and together they documented rural poverty and the exploitation of sharecroppers and migrant laborers for the next five years — Taylor interviewing and gathering economic data, Lange taking photos.
From 1935 to 1939, Dorothea Lange's work for the RA and FSA brought the plight of the poor and forgotten — particularly sharecroppers, displaced farm families, and migrant workers — to public attention. Distributed free to newspapers across the country, her poignant images became icons of the era.
Lange's best-known picture is titled "Migrant Mother." The woman in the photo is Florence Owens Thompson. The original photo featured Florence's thumb and index finger on the tent pole, but the image was later retouched to hide Florence's thumb. Her index finger was left untouched (lower right in photo).