A major archive of World War II-era documents in Germany said it had completed digitizing some 6.7 million documents on the Nazis' slave labor program. The International Tracing Service in Bad Arolsen said digitization would help preserve the documents. Copies of the data were transferred Monday to Jerusalem's Yad Vashem Memorial, the United States Holocaust Memorial Museum and the Institute of National Remembrance in Poland. Head archivist Udo Jost said the documents attest to the "monstrous dimension" of the slave labor program. They include employment records, patient files, insurance documents and registry cards. Experts estimate that 12 million people were forced to work for the Nazis or industries that supported Hitler's Third Reich.