German scholars exploring newly opened trove of documents find letter indicating Pope knew of massacre of Jews in Warsaw and Lviv from own sources, but denied it to Americans

Leading historian set to study newly released documents says 'no doubt' Piux XII knew of mass murder of Jews, but much may yet be learned about his state of mind, silence on matter

Critics, including Jewish organizations, condemn pontiff for never speaking out against Holocaust; church claims he helped rescue several thousand Jews

Some Jewish groups charge pontiff stayed silent during Holocaust; defenders say he encouraged sheltering Jews; church says 'no reason to fear history'

Premiering January 21 ahead of March 2 opening of the Secret Vatican Archives for 1939-1958, film provides historical context for 17 million pages of documents to be released