JUDY WOODRUFF:

When the death camps and ghettos of Europe were liberated at the end of World War II, a psychologist from Chicago visited former prisoners and recorded dozens of interviews.

David Boder's recordings are among the earliest testimonies from Holocaust survivors. And long-missing reels of songs from this collection were recently discovered at the University of Akron, Ohio.

From PBS station WVIZ ideastream in Cleveland, David C. Barnett reports.