Gulf Oil Spill Geek Field Day

In this photo made June 19, 2010, Edward B. Overton, Professor Emeritus, Environmental Sciences, LSU shows samples of crude oil from the Mississippi Canyon 252 (Deepwater Horizon) oil spill at a lab at the Coastal Studies Institute at Louisiana State University in Baton Rouge, La. Researchers analyze the composition of the oil to see how the oil is changing. (AP Photo/Tim Mueller)