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WASHINGTON - JULY 18: National Park Service employee Henry Pittman rolls up a fence in front of the US Capitol July 18, 2006 in Washington, DC. The weather forecast predicts the temperature will be in the upper 90's and may reach 100 degrees. (Photo by Mark Wilson/Getty Images)

WASHINGTON - JULY 18:  National Park Service employee Henry Pittman rolls up a fence in front of the US Capitol July 18, 2006 in Washington, DC. The weather forecast predicts the temperature will be in the upper 90's and may reach 100 degrees.  (Photo by Mark Wilson/Getty Images)