Chaim Weizmann institute was a global success attracting scientists from all over the Diaspora. In 1949 there were 20 researchers, twenty years later there were 400 and 500 students. The Honourable Chaim Weizmann met with United States President Harry Truman and worked to obtain the support of the United States, they discussed emigration, for the establishment of the State of Israel. The President lived at Rehovot, where he regularly received the Prime Minister David Ben-Gurion into his garden. He was denied any actualisation of the political role he had hoped for by the Left. He had to be consoled with the Weizmann
President of Israel and journalist; and Chaim Herzog was a military leader, attorney, and diplomat. The first Israeli presidents were born in the former Russian Empire, which was true of much of the leadership in the early days of the state. The first native-born president, as well as the first with a Sephardi background, was Yitzhak Navon. The first president with a Western European background was Chaim Herzog, who originally came from Belfast, United Kingdom. The first president with a Mizrahi background was Moshe Katsav, who was born in Iran. All Israeli presidents from Yitzhak Ben-Zvi to Ezer Weizman were members of, or