President of Israel who is most likely to command a majority in the Knesset. The president awards the Israel Prize on Yom Ha'atzmaut and the Wolf Prize. The president also serves as the main speaker at the opening ceremonies of the half-yearly Knesset conference, as well as at the annual official ceremonies for Yom Hazikaron and Yom HaShoah. Most Israeli presidents were involved in national politics or Zionist activities before taking office. Some were also distinguished in other fields: for example, Chaim Weizmann was a leading research chemist who founded the Weizmann Institute of Science in Rehovot; Zalman Shazar was an author, poet,
Chaim Weizmann Nobel Prize laureate Fritz Haber, but took over the directorship himself after Haber's death en route to Palestine. During World War II, he was an honorary adviser to the British Ministry of Supply and did research on synthetic rubber and high-octane gasoline. After the Second World War, a Jewish group called Nakam formulated several plans to kill Germans in revenge for the Holocaust. Nakam's leader Abba Kovner, a former Lithuanian partisan, testified that he had approached Weizmann (at that time, President of the World Zionist Organization) with plans for a mass poisoning and that Wiezmann had put him in touch