Dorothea Lange was an American photographer ( 6 May 1895- 11 October 1965). Her work became known during the era of the Great Depression. She started her career in San Francisco during the 1920's capturing commercial portraits. In 1935, however, she started working for the Farm Security Administration documenting the struggled exodus of farm families that had to migrate to the West and look for work. Due to Dorothea's style, the development of documentary photography was born.