Natan Shalem in Israel are named after him. Natan Shalem Natan Shalem (October 10, 1897 - 1959) was an Israeli geographer, geologist and researcher. Shalem was born in Thessaloniki to a traditional Jewish family. Growing up Shalem studied in various Jewish educational institutes. In 1914 Shalem immigrated to Ottoman Palestine. During the First World War Shalem began to teach in the moshava Sejera. In 1919 Shalem went to study geology in Florence where he obtained his doctorate in 1924. After getting his doctorate Shalem returned to Palestine and settled in Jerusalem, where he worked as a teacher for geography, chemistry and physics
Eli Sadan During his studies, he was asked by Rabbi Kook to assist in establishing Moshav Keshet in the Golan Heights and in establishing a core of Torah scholars in Eilat. Together with Rabbi Tzvi Tau, he was delegated by Rabbi Zvi Yehuda with regarding to prisoners of Zion, among them Natan Sharansky. They even held a secret telephone conversation before Sharansky entered the Russian prison. Afterwards, Sadan held several meetings with US officials in order to secure Sharansky's release. In 1988, Sadan established the first pre-military preparatory program (mechina), together with Rabbi Yigal Levinstein. The mechina is named "Bnei David" and