2010 United States deepwater drilling moratorium
On May 30, 2010 a 6-month moratorium on all deepwater offshore drilling on the Outer Continental Shelf was declared by U.S. Secretary of the Interior Ken Salazar. The limitation was in response to the Deepwater Horizon oil spill which occurred in the Gulf of Mexico.
Source: Wikipedia — 2010 United States deepwater drilling moratorium (CC BY-SA 4.0)