अपनी भाषा में प्लॉट जोड़ेंDocumentary about early 20th-century photographer Lewis Hine, who helped to expose grim working conditions in American factories and mines, especially the abuse and exploitation of children ... सभी पढ़ेंDocumentary about early 20th-century photographer Lewis Hine, who helped to expose grim working conditions in American factories and mines, especially the abuse and exploitation of children by their employers. Later, he became the official photographer for the construction of the... सभी पढ़ेंDocumentary about early 20th-century photographer Lewis Hine, who helped to expose grim working conditions in American factories and mines, especially the abuse and exploitation of children by their employers. Later, he became the official photographer for the construction of the Empire State Building.