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
Faisal–Weizmann Agreement explicitly authorised by his father to enter into such an agreement, with his instructions from his father limited to the requirement that he accept only fulfilment of the previous British promises for Arab independence; the caveat was added as a result. The next day, Weizmann arrived in Paris to head the Zionist delegation to the Peace Conference. Agreement Between Emir Feisal and Dr. Weizmann 3 January 1919 His Royal Highness the Emir Feisal, representing and acting on behalf of the Arab Kingdom of Hedjaz, and Dr. Chaim Weizmann, representing and acting on behalf of the Zionist Organization, mindful of the