After a delay of nearly two years, the Air Force on Monday released 250 pages of records on its use of cadet informants at the Air Force Academy. But most of the pages released are all but blank, with the Air Force citing concerns over law enforcement secrecy and personal privacy to explain the redactions. It's the latest chapter in a the saga of one of the Air Force's most secretive programs, which used cadets to spy on their classmates as agents with the Office of Special Investigations worked to root out rapists and drug users at the school. A series of Gazette investigations showed that the informant program tipped off academy leaders serious problems in academy's athletic department. Read more on Colorado Springs Gazette