German Chancellor Angela Merkel passes by a photo of a demonstration at the beginning of a visit of the Federal Department for the Stasi Records in Berlin in this January 15, 2009 file photo. For thousands of former employees of Communist East Germany's loathed Stasi secret police, next week's 20th anniversary of the fall of the Berlin Wall is no cause for celebration. Experts say few of the Stasi's 91,000 ex-employees, or its 170,000 unofficial informers, have come to terms with their role in one of the world's most repressive organisations.