BP Oil Spill: One Year Later, A Look Back In Pictures On April 20, 2010, the Deepwater Horizon oil rig exploded, killing 11 workers and setting off the worst offshore oil spill in U.S. history. Fishermen and other businesses struggled; the claims process has been excruciatingly slow. Here, a visual tour of the past year.

The BP Oil Spill, One Year Later

NPR marks the anniversary with a series of stories that look at the Gulf Coast and at BP.

BP Oil Spill: One Year Later, A Look Back In Pictures

April 20, 201112:42 PM ET

Special Series

The BP Oil Spill, One Year Later

NPR marks the anniversary with a series of stories that look at the Gulf Coast and at BP.