Did Tar Balls At Dry Tortugas National Park Descend From "Spills of Opportunity"?

When word came earlier this month that tar balls had washed ashore at Dry Tortugas National Park, the implication was that they were related to the Deepwater Horizon catastrophe. But then an analysis showed they weren't related, so where did they come from? Some think they were tied to a "spill of opportunity."
- By Kurt Repanshek - May 28th, 2010 2:21am