Cleanup crews in the marshlands in Louisiana are using a long-armed machine with a rake on the end to help restore areas that were inundated with oil from the BP spill last April. Elizabeth Shogren/NPR hide caption

itoggle caption Elizabeth Shogren/NPR

Monsignor Frederic Brunet blesses the boat the Maycie Brooke before climbing aboard the vessel to begin the boat blessing parade, in Chauvin, La. William Widmer for NPR hide caption

itoggle caption William Widmer for NPR

The Deepwater Horizon oil rig burns in the Gulf of Mexico, April 21, 2010. Investigations before and after the disaster found the agency responsible for overseeing the industry quite friendly with those it regulated. Gerald Herbert/AP hide caption

itoggle caption Gerald Herbert/AP

Teens walk past a closed oyster business last week in Golden Meadow, La. A number of Louisiana fishermen have had to close because of economic conditions blamed on the Deepwater Horizon oil spill. Nearly a year after the spill, hundreds of lawsuits are slowly moving through the courts. Dave Martin/AP hide caption

itoggle caption Dave Martin/AP

A family from New Orleans visits a beach in Pensacola, Fla., just before spring break season last month. In the distance, workers continue to clean up after the Deepwater Horizon oil spill. Eric Thayer/Getty Images hide caption

itoggle caption Eric Thayer/Getty Images

Seafood samples are placed in Pyrex dishes to await sensory analysis. Inspectors will sniff for the slightest whiff of oil. Samples are also cooked for a taste test to detect any problems. Debbie Elliott/NPR hide caption

itoggle caption Debbie Elliott/NPR