BP Oil Spill One Year Later (Part 4): Two Photos That Tell You What You Need to Know:

There's 12 crosses on the beach at an anniversary vigil at Grand Isle, Louisiana. Eleven of them represent the workers killed when the Deepwater Horizon blew up. The large 12th one in the center is for the Gulf of Mexico. The candles are in old plastic milk containers.

That's a picture from yesterday at a clean-up at Fourchon Beach, Louisiana. Now, a year later, the oil rests just below the surface sand. It's the beach where former BP chief executive Tony Hayward held one of his ill-fated press conferences. Chances are that we won't know for years and years just what the oil did to the Gulf and its coast, but the clean-up continues, even if it's just for cameras on a black gold anniversary.