The IDF has imposed a closure on the West Bank and Gaza Strip for the Shavuot holiday. The United States has proposed holding trilateral talks with Israel and the Palestinians in order to accelerate negotiations on core issues. Two hundred members of Kibbutz Kfar Aza, located on the border of the Gaza Strip, have been invited to spend the Shavuot holiday in Kibbutz Degania Alef, located on the shores of the Sea of Galilee. Russian news agencies said Saturday that preparations for the startup of a nuclear power plant in Iran will begin this autumn. Hillary Rodham Clinton ended her historic campaign for the presidency on Saturday and told supporters to unite behind rival Barack Obama, closing out a race that was as grueling as it was groundbreaking.