The US Govt. is responsible to its people for the caretaking of the resources and protection of lives and environment. It seems that it has failed in some of those responsibilities by lack of enforcement or rules and regulations that it put into place for that purpose. They could have shut BP down until all conditions were in conformance. They still can. But they are also somewhat at fault for permitting operations, sidestepping environmental remediation planning, failing to separate interests of safety and monetary recoveries (MMS), and a whole host of other things they are supposed to be doing to protect us and our environment.