Lange's Migrant Mother snapshots the grim gaze of Florence Owens Thompson, one of the many destitute farmers in California. In 1936, when this picture was captured, Thompson was a mother of seven children, and lived in Nipomo, California.
On August 28, 1963 more than 200,000 people participated in the March on Washington for Jobs and Freedom in the nation's capital. The John F. Kennedy administration was successfully pressured by the march to introduce a robust federal civil rights…