G8: [Was George Bush recently elected President of China?]

On another key summit topic, climate change, Frattini said Italy was pushing an ''ambitious'' proposal but China was resisting.

Report: [Have trace amounts of CO2 dangerously heated Chesapeake Bay?]

And many of the threats are caused or worsened by man's polluting of the Chesapeake Bay with nutrients, the report charges. Global warming also might be heating the waters, causing some pathogens to thrive.

How the Chesapeake Bay Swim Differs from Pool Swimming

5. The water temperature is usually 68 - 72 degrees during the Bay Swim. However, during especially cold weather, the water has been around 60 degrees. Pools are usually around 80 - 85 degrees.

The colder bay water temperature may startle you when you first plunge in (adds to the fun and excitement of joining a wave of 300 thrashing swimmers). Consider wearing a wetsuit if you're doing the Bay Swim for the first time.

The 4.4 Mile Great Chesapeake Bay Swim Race Report

I could feel pockets of cold come across me so quickly, it made me shiver. And then suddenly a freezing blast of water. I kid you not, I got a brain freeze from the cold water current. Then, I thought about hypothermia and wondered if I should even be out here with no wetsuit. Despite my layer of insulation, I was freezing, my body was fine. But my face, and my head hurt from the cold water.