When ten-year-old Elliott asks his 90-year-old great-grandfather, Jack, about the number tattooed on his arm, he sparks an intimate conversation about Jack’s life that spans happy memories of childhood in Poland, the loss of his family, surviving Auschwitz and finding a new life in America.The Number on Great-Grandpa’s Arm

https://www.hbo.com/documentaries/the-number-on-great-grandpas-arm