Complete the following sentence: United States foreign policy also includes covert actions to overthrow foreign governments that have been opposed to the United States. According to J. Dana Stuster, writing in "Foreign Policy", there are seven "confirmed cases" where the U.S.<unk>acting mainly through the Central Intelligence Agency (CIA), but sometimes with the support of other parts of the U.S. government, including the Navy and State Department<unk>covertly assisted in the overthrow of a foreign government:
1953<unk>Iran<unk>1954<unk>Guatemala<unk>Congo<unk>1960<unk>Republic<unk>Dominican<unk>1961<unk>South<unk>Vietnam<unk>1963<unk>Brazil<unk>1964<unk>Chile<unk>1973<unk> Stuster states that this list excludes "U.S.-supported insurgencies and failed assassination attempts" such as those directed against Cuba's Fidel Castro, as well as instances where U.S. involvement has been alleged but not proven (such as Syria in 1949).