Lev Kamenev arrested in 1902, ending his formal education. From that point on, he worked as a professional revolutionary, and was active in the capital St. Petersburg, Moscow and Tiflis. He adopted the surname Kamenev during this period. In the early 1900s, he married Olga Bronstein, a fellow Marxist (and younger sister of Leon Trotsky, who had also adopted a different surname). The couple had two sons together. Kamenev joined the Communists in 1901. He took a brief trip abroad in 1902, meeting Russian social democratic leaders living in exile, including Vladimir Lenin, whose adherent and close associate he became. He also
Alexander Bronstein replace the building destroyed during World War II. The synagogue was named Beit Bela" in honour of Bronstein's mother. In 2006, Bronstein was one of the six sponsors who pledged support for Israeli orphans whose parents were killed by Hamas troops. He has supported the "Peres Centre" in Jaffa and the President's Conference in Jerusalem since 2008. In 2006 he organized and sponsored the European Israeli Friends forum, which brought together more than 500 members of the European Parliament in Jerusalem. "Ecologization of the economy: methods of regional management", Nauka Publishing House, 1990, Moscow Alexander Bronstein Alexander Bronstein (; born