Dora Apel is Associate Professor and W. Hawkins Ferry Chair in Modern and Contemporary Art at Wayne State University. She is the author of Memory Effects: The Holocaust and the Art of Secondary Witnessing (2002) and Imagery of Lynching: Black Men, White Women, and the Mob (2004). Shawn Michelle Smith is Associate Professor of Visual and Critical Studies at the School of the Art Institute of Chicago. She is the author of American Archives: Gender, Race, and Class in Visual Culture (1999) and Photography on the Color Line: W.E.B. DuBois, Race, and Visual Culture (2004).