On display at this year's Venice Biennale is this real 60-ton tank turned upside down and on top of which the Jennifer Allora and Guillermo Calzadilla "installed a treadmill where a world-class runner works out for fifteen minutes of every hour." The artists "have found a way to encapsulate, possibly exorcise, summon, and certainly give visual form to the freaked-out way the world sees the United States."