Birkenau’s chimneys spew that filthy brown smoke ceaselessly above this nightmarish camp of pariahs. Breaks in operations are unknown in this crematorium city. The toxic gas has been belching out day and night for years. The furnaces, fired up until they’re glowing white, are trembling; mountains of burning flesh send sooty sparks into the air. There is no escaping the spectacle, which must be watched all day long.

