Malcolm Byrne National Security Archive 2013-08-19  Marking the sixtieth anniversary of the overthrow of Iranian Prime Minister Mohammad Mosaddeq, the National Security Archive is today posting recently declassified CIA documents on the United States' role in the controversial operation. American and British involvement in Mosaddeq's ouster has long been public knowledge, but today's posting includes what is believed to be the CIA's first formal acknowledgement that the agency helped to plan and execute the coup.