The most famous priest to be killed by the Nazis is probably Saint Maximilian Kolbe, who died in Auschwitz in 1941. But he was far from the only priest to be murdered. Three of the thirty barracks at the Dachau concentration camp were occupied by clergy, and of the 2,720 men imprisoned there, 2,579 were Catholics. More than a third of the men in the "priest block" died there. Fr Joseph Fessio joins us with their stories.