Michael Bloomberg, Mayor of New York City, left, shakes hands with World Bank's President Robert Zoelick after signing agreements during the C40 Large Cities Climate Summit in Sao Paulo, Brazil, ... more 
Michael Bloomberg, Mayor of New York City, left, shakes hands with World Bank's President Robert Zoelick after signing agreements during the C40 Large Cities Climate Summit in Sao Paulo, Brazil, Wednesday, June 1, 2011. less 
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Associated Press | Photo By Andre Penner
Wed, Jun 1, 2011 11:46 AM EDT