as part of the Truman Show, the NSC was created in 1947.

"Under President Richard M. Nixon, the NSC staff, then headed by Henry A. Kissinger, was transformed from a coordinating body into an organization that actively engaged in negotiations with foreign leaders and implementing the President's decisions. The NSC meetings themselves, however, were infrequent and merely confirmed decisions already agreed upon by Nixon and Kissinger."

[link to 2001-2009.state.gov (secure)]

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