On the morning I first saw the Kosmaj monument, the fog had not yet lifted from the Smederevo highway. I had driven south from Belgrade for forty minutes, past the last of the tower blocks, and then the road bent through pine forest and there it was — five concrete wings rising from a ridge like a starburst frozen mid-explosion. Bogdan Bogdanovic designed it in 1970 to mark the Partisan mobilization site. The partisans who fought here in 1941 would not have recognized it as a memorial. It looks like something that arrived from elsewhere — from a future that never happened.