Joshua Allen Harris, center, stops Nemory Toure, right, a sanitation worker, from sweeping up his inflatable art designed for subway gratings, New York, Tuesday April 8, 2008. Harris explained to Toure that the art, fashioned from garbage bags, is placed on a subway grating and inflates as a passing train forces air through the vents from underground. AP Photo logo AP Photo 46 months ago

Joshua Allen Harris, center, stops Nemory Toure, right, a sanitation worker, from sweeping up his inflatable art designed for subway gratings, New York, Tuesday April 8, 2008. Harris explained to Toure that the art, fashioned from garbage bags, is placed on a subway grating and inflates as a passing train forces air through the vents from underground.