BOSTON (AP) — A Massachusetts college professor's discovery of photos his grandfather took during World War II has inspired a new documentary on the Holocaust, as seen through the eyes of one American soldier.

Matthew Nash's film — "16 Photographs at Ohrdruf" (OHR'-druhf) — tells of the first concentration camp that U.S. soldiers liberated in 1945.

Nash started the project after finding photos his late grandfather took at the camp while serving as an Army medic in the war.

Geoffrey Megargee, a scholar from the U.S. Holocaust Memorial Museum, says the documentary personalizes history and reminds people of the role American soldiers had in bringing Nazi war crimes to an end.

The film will be publicly screened for the first time Thursday evening at Lesley University in Cambridge, Mass.