Spent the weekend rather immersed in the world of war photography. I’ve been involved in James Nachtwey’s XDR-TB campaign over the past couple of weeks, and seized the opportunity to watch the documentary about him, War Photographer, at a rare screening at the Barbican. The film is a must-see. If I were screening it, I’d programme it on a double bill with Chris Marker’s Sunless. To me, both Marker and Nachtwey focus unblinkingly into the abyss which — for much of the world — was the twentieth century, yet frame their record of these terrors in a radiant humanism. In …