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 wholly separated and the newly conceived mandate-system applied to them. Weizmann stated at the conference that "the Zionist objective was gradually to make Palestine as Jewish as England was English" Shortly thereafter, both men made their statements to the conference. After 1920, he assumed leadership in the World Zionist Organization, creating local branches in Berlin serving twice (1920–31, 1935–46) as president of the World Zionist Organization. Unrest amongst Arab antagonism to Jewish presence in Palestine increased erupting into riots. Weizmann remained loyal to Britain, tried to shift the blame onto dark forces. The French were commonly blamed for discontent, as