By Bob Marshall

How many isolated incidents constitute a trend?

That's a question sportsmen should be asking themselves today after another oil rig off the Louisiana coast exploded. When the BP's Deepwater Horizon exploded four months ago - killing 11 workers, eventually pumping 200 million gallons of crude into the Gulf and causing the costliest environmental disaster in the nation's history - we were assured by the oil industry and the Drill-Baby-Drill! crowd this was an isolated incident. Now it doesn't seem so isolated.

Fortunately this time there was no loss of life, and while a mile-long oil sheen has been spotted from the site, early reports indicate this probably won't amount to a big leak. Besides, since the rig stands in less than 400 feet of water, any repairs should be much simpler than at Deepwater Horizon.

But it's a good time to point out the industry's claims about its safety record has been revealed as mostly hogwash.