A secret internal history of the Justice Department's Nazi-hunting unit, the Office of Special Investigations, chronicles numerous hidden chapters in the office's 31-year-existence. But a heavily redacted version of the report turned over by the Justice Department in response to a lawsuit deletes more than 1,000 passages in the report, including many of the most intriguing references. Here is a sampling of the original passages in the unredacted report, obtained by the New York Times, as compared with the deleted versions. The full report details how the United States became a safe haven" for some Nazis, with some American officials actively working to help persecutors gain entry to the United States and conceal their identities and crimes. But the redacted version prepared by the Justice Department omits many of the central elements of these cases. The redacted report omits the debate within the CIA in 1953 over what Otto von Bolschwing, a Nazi associate of Adolph Eichmann who became a CIA asset, should tell immigration officials or others in the United States if confronted about his Nazi past. It also deletes references to what American officials knew about his atrocities, including the assertion from a Justice Department officials that he might "be guilty of acts more heinous than anyone else currently under investigation." [many additional examples follow]