"In less than ten minutes all the fit [healthy] men had been collected together in a group. [I]n [the SS guards'] rapid and summary choice each one of us had been judged capable or not of working usefully for the [Third] Reich... [W]e know that of our [group] no more than ninety-six men and twenty-nine women entered the [camps], and that of all the others, more than five hundred in number, not one was living two days later…"