<P> The United States Mission to the United Nations is the formal title of the United States delegation to the United Nations (UN). Each nation at the UN has a similar delegation, although only a few are members of the United Nations Security Council . The United States Mission joined in the original founding of the UN, among 51 member states, under the United Nations Charter in 1945 . </P> <P> There are several major leadership roles in the US Mission . The primary role, United States Ambassador to the United Nations, is the leader of the U.S Mission to the United Nations . The position is more formally known by the exact title: </P>

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