Thousands of naked volunteers pose for U.S. photographer Spencer Tunick at Mexico City's Zocalo square...
Thousands of naked volunteers pose for U.S. photographer Spencer Tunick at Mexico City's Zocalo square May 6, 2007. A record 18,000 people took off their clothes to pose for Tunick on Sunday in Mexico City's Zocalo square, the heart of the ancient Aztec empire. REUTERS/Henry Romero (MEXICO) Also see image: GF2DVFQIIFAA
