Part of the October 2009's Creative Time Summit: Revolutions in Public Practice, Making Oppression Visible opens with introductory remarks by Okwui Enwezer that set forthright the complex and often contradictory relationship between documentary photography and violence, of the medium's intentions and the various consequences of its products. His introduction is followed by presentations by artists Yael Bartana, Dara Greenwald and Alfredo Jaar. Here is a link to the Pulitzer Prize-winning photograph referenced by Enwezer and Jaar, which was taken by photographer Kevin Carter (the child's fate is unknown; Carter committed suicide a year later) (28 minutes).