Pedzisa mutsara unotevera: Muna 2010, purezidhendi akati, nenzira yakafanana, kuti yakanga yava nguva yokuti United States "ikurumidze nokukurumidza" kuchinja kwayo kubva kumafuta kuenda kumamwe manyuko esimba uye akapikira kukurudzira chiito chokukurumidza pamutemo wokushanduka kwemamiriro okunze, zvichida achitsvaka kushandisa hasha huru pamusoro
kudonha kwemafuta muGulf of Mexico.