Trevor Paglen, for the last two decades (yes, digital surveillance has been going on for that long and longer) “has been on a mission to photograph the unseen political geography of our times. His art tries to capture places that are not on any map – the secret air bases and offshore prisons from which the war on terror has been fought – as well as the networks of data collection and surveillance that now shape our democracies, the cables, spy satellites and artificial intelligences of the digital world.”