"A secret history of the United States government’s Nazi-hunting operation concludes that American intelligence officials created a “safe haven” in the United States for Nazis and their collaborators after World War II, and it details decades of clashes, often hidden, with other nations over war criminals here and abroad...."
"The Justice Department report, describing what it calls “the government’s collaboration with persecutors,” says that O.S.I investigators learned that some of the Nazis “were indeed knowingly granted entry” to the United States, even though government officials were aware of their pasts. “America, which prided itself on being a safe haven for the persecuted, became — in some small measure — a safe haven for persecutors as well,” it said."
via New York Times
The Office of Special Invesigations: Striving for Accountability in the Aftermath of the Holocaust