Photographer Henryk Ross smiles from his work ID card. But his photos of Jews in the ghetto, taken in secret and at great personal risk, were mostly grim. After the war Ross published his work in a book; he later testified at the 1961 trail of Holocaust mastermind Adolf Eichmann, where the photos served as evidence in sentencing Eichmann to death. In 1956, Ross emigrated to Israel; he died there in 1991, at age 81