It's been three years since the Deep Water Horizon oil spill in the Gulf of Mexico. BP, the company held responsible for the spill, has announced as of yesterday that the U.S. Coast Guard is ending its clean up effort along Mississippi, Alabama, and Florida. BP has spent more than 14 billion dollars on the clean up effort, and 70 million personnel hours in response to the spill that happened in April of 2010. The spill occurred after an explosion on the oil rig. The fire could not be put out and the rig sank, causing the largest oil spill in American history. The well that was connected to the rig spewed out an estimated 172 million gallons of crude oil into the Gulf. Maintenance efforts will continue along 84 shoreline miles of Louisiana. Efforts of the clean up have much of the Gulf back to normal or at least the same as before the accident happened.