File- In this Jan. 27, 2012, file photo, a couple walks past the slogan &#039;Arbeit Macht Frei&#039; (Work Sets You Free) at the main entrance of the Sachsenhausen Nazi concentration camp on the international Holocaust remembrance day in Oranienburg, Germany. An Associated Press investigation found dozens of suspected Nazi war criminals and SS guards collected millions of dollars in Social Security payments after being forced out of the United States.  (AP Photo/Markus Schreiber,File)