WASHINGTON - In a rare occurrence, the CIA fired an officer who acknowledged giving classified information to a reporter, NBC News learned Friday. The officer flunked a polygraph exam before being fired on Thursday and is now under investigation by the Justice Department, NBC has learned. Intelligence sources tell NBC News the accused officer, Mary McCarthy, worked in the CIA's inspector general's office and had worked for the National Security Council under the Clinton and and George W. Bush administrations. The leak pertained to stories on the CIA’s rumored secret prisons in Eastern Europe, sources told NBC. The information was...