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 in No. 502 Squadron RAF, he was killed when his plane was shot down over the Bay of Biscay in February 1942. His body was never found and he was listed as "missing". His father never fully accepted his death and made a provision in his will, in case he returned. He is one of the British Empire's air force casualties without a known grave commemorated at the Air Forces Memorial at Runnymede in Surrey, England. The elder son, Benjamin (Benjie) Weizmann (1907–1980), settled in Ireland and became a dairy farmer. His nephew Ezer Weizman, the son of his brother