Affective witnessing provides a new paradigm for understanding all witnessing as inherently relational, as well as describing a particular mode of witnessing in which affect itself is what is witnessed. New forms and practices of media witnessing have brought this specific mode to prominence, with consequences for how witnessing works and the formation of witnessing communities. This chapter considers three related bodies of testimonial images: photographs from Abu Ghraib, footage from an Australian juvenile detention center and selfie protest images that respond to conditions for prisoners in post-revolutionary Egypt.