Scott Porter and Matt Simmons join David Gibbons to discuss the Deepwater Horizon oil spill (also referred to as the BP oil spill, the Gulf of Mexico oil spill or the Macondo blowout), a massive ongoing oil spill in the Gulf of Mexico, now considered the largest offshore spill in U.S. history. Some estimates placed it by late May or early June as among the largest oil spills in the world with tens of millions of gallons spilled to date. The spill stems from a sea floor 10,000 foot deep oil gusher (MC252) that followed the April 20, 2010 Deepwater Horizon drilling rig explosion. The explosion killed 11 platform workers and injured 17 others. The exact spill flow rate is uncertain in part because BP has refused to allow independent scientists to perform accurate measurements and is a matter of ongoing debate.