VENICE, ITALY - JUNE 01: An athlete runs on a treadmill placed on top of a 60-ton overturned military tank installation by Allora and Calzadilla in front of the US Pavillion of the Giardini Biennale on June 1, 2011 in Venice, Italy. This year's Biennale is the 54th edition and will run from June 4th until 27 Novembe (Photo by Marco Secchi/Getty Images)
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