KEY WEST, Florida (Reuters) - Fears that oil from a massive Gulf of Mexico spill was drifting to U.S. shorelines rose on Tuesday after tar balls were found in Florida, while BP faced mounting pressure to stem its leaking well.
In a sign of the spill's widening environmental impact, the United States nearly doubled a no-fishing zone in waters seen affected by the oil gushing from the blown well, extending it to 19 percent of U.S. waters in the Gulf.
