Chaim Weizmann Zionist activity, and executed in 1939. His fate became known to his wife and children only in 1955. Maria Weizmann was a doctor who was arrested as part of Stalin's fabricated "Doctors' plot" in 1952 and was sentenced to five years' imprisonment in Siberia. She was released following Stalin's death in 1953, and was permitted to emigrate to Israel along with her husband in 1956. Weizmann was married to Vera Khatzmann. The couple had two sons. The younger one, Flight Lieutenant Michael Oser Weizmann (1916–1942), fought in the Royal Air Force during World War II. While serving as a pilot
Chaim Weizmann during World War I, Weizmann was director of the British Admiralty laboratories from 1916 until 1919. In April 1918 at the head of the Jewish Commission, he returned to Palestine to look for "rare minerals" for the British war effort in the Dead Sea. Weizmann's attraction for British Liberalism enabled Lloyd George's influence at the Ministry of Munitions to do a financial and industrial deal with Imperial Chemical Industries (ICI) to seal the future of the Zionist homeland. Tirelessly energetic Weizmann entered London again in later October to speak for a solid hour with the Prime Minister, propped by "The