Holocaust Survivor, Who Hid in a Sewer, Headed U.S. Tech Firm

At age 16, Carl H. Rosner already had endured the breakup of his parents’ marriage in Hamburg, Germany, life in an orphanage with other Jewish children, the Nazi-decreed closure of his school, harassment by stone-throwing ruffians in the street, and a cattle-car ride to the Buchenwald concentration camp.

“I was always optimistic,” he said later. “I figured this couldn’t last, that the Germans couldn’t succeed at what they were doing.”

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