How the Yes Men inspired a climate activist to impersonate an oil speculator—and derail a multimillion-dollar federal land giveaway. —By Bryan Farrell

During the final days of the Bush administration, the Bureau of Land Management (BLM) scheduled a controversial auction of oil and gas leases on federal lands, including areas bordering national parks and monuments in Utah. While environmental organizations launched a round of protests and lawsuits, Tim DeChristopher, a 27-year-old econ major at the University of Utah, decided he had to try to stop the sale by himself. Not knowing exactly how he'd do it, DeChristopher walked into the auction in Salt Lake City on December 19, 2008, and had a sneaky idea handed to him in the form of a bidder's paddle.

Simply by raising it again and again and pretending to bid on the leases, he proceeded to drive up their prices and outbid the real speculators on 13 parcels covering more than 22,000 acres and worth $1.7 million dollars.