Photography involves drawing with light and has many uses including art, commercial applications, science, and social documentation. The document discusses American photographer James Nachtwey, who was born in 1948 in New York. It quotes Nachtwey saying "I have been a witness, and these pictures are my testimony. The events I have recorded should not be forgotten and must not be repeated." Finally, the document emphasizes the importance of photography for society in areas like art, investigations, communication, and expression.