A Polish Jew who joined the Red Army to escape the Shoah and then later became a veteran of Israel's Independence war, for more than thirty years, Professor Marcus Klingberg was the head of Israel’s secret biological weapons program. Yet, unbeknownst to all, he had remained connected with the KGB. Tried in secret and sentenced to 20 years in prison, he is said to be "the most dangerous spy Israel has ever known.”
