WASHINGTON (AP) -- A federal judge has ruled that a final volume of the CIA's three-decade-old history on the failed Bay of Pigs invasion of Cuba can remain shrouded in secrecy because it is a draft, not a finished product.

The CIA characterized the volume in court papers as "a polemic of recriminations against CIA officers who later criticized the operation."

U.S. District Judge Gladys Kessler accepted the CIA's arguments that the fifth volume entitled the "CIA's Internal Investigations of the Bay of Pigs Operations" did not even pass through the first stage of a multilayer review process.