Fifteen hours of interviews describing the actions of a group of World War II-era diplomats who defied official policies to save tens of thousands of lives during the Holocaust have been added to USC Shoah Foundation’s 55,000-strong Visual History Archive (VHA) thanks to a collaboration with the Andrew J. & Joyce D. Mandell Family Foundation.

A screening of a film about the Holocaust, to be held Thursday at Mandell JCC in West Hartford, will be followed by a panel discussion on “The Mystery of Goodness,” about people who are compelled to help others at all costs.

A new project currently filming throughout Europe and Israel aims to document the stories of non-Jewish diplomats who defied orders and saved hundreds of thousands of Jews from the Nazis during World War II.