Initially, the CIA used the excuse of trying to protect national security, but following 1991 and the collapse of the Soviet Union their stance changed. The CIA became more open to declassifying documents, but still took considerable time to do so, despite the NSA archive arguing there would be minimal to no threat to national security for the CIA to release said documents.[1] The United States' acknowledgement came in the form of a data dump of several declassified reports that had been used during both the planning and the execution of the coup. Written shortly after the coup had taken place, it is regarded as the most thorough and complete report on Operation Ajax.