Deepwater Horizon oil spill 17 of whom were treated for injuries. The Deepwater Horizon sank on the morning of 22 April 2010. The oil leak was discovered on the afternoon of 22 April 2010 when a large oil slick began to spread at the former rig site. The oil flowed for 87 days. BP originally estimated a flow rate of . The Flow Rate Technical Group (FRTG) estimated the initial flow rate was . The total estimated volume of leaked oil approximated with plus or minus 10% uncertainty, including oil that was collected, making it the world's largest accidental spill. BP challenged the higher
Reactions to the Deepwater Horizon oil spill of one of the country's leading companies", to President Obama (text of letter) that expressed a concern over "double standards" compared to the sub-prime based banking crisis of 2007–2010 and over "prejudicial and personal" comments in the media. Initially BP downplayed the incident; CEO Tony Hayward called the amount of oil and dispersant "relatively tiny" in comparison with the "very big ocean." Hayward also initially stated that the environmental effect of the Gulf spill would likely be "very very modest." Later, he said that the spill was a disruption to Gulf Coast residents and himself adding, "You know, I'd like