Some foreign services show a tendency to break up hierarchical structures by giving their ambassador the role of a coach. In view of his double responsibility towards his own and the host govern- ment, there are limits to downgrading an ambassador's role. In the end, it is the ambassador who makes all final decisions. Once a decision is made, the ambassador has to be sure that the staff implements it in a loyal way. As was previously mentioned, an ambassador has the final decision only if his authority over all mem bers of the staff is assured.'' The US Foreign Affairs Manual clearly states the extent of the ambassador's authority as follows: "The of authority encompasses not only the personnel of the Department of State and the Foreign Service, but also personal representatives of other United States Executive Branch agencies military those personnel under the command of a US area which have programs or activities in the country