Analysis / Commentary, Next Gen CommunityWhat is behind South African President Jacob Zuma’s refusal to relinquish nuclear weapons material?ByJessica Gottesman and CSIS PONIPublished May 8, 2015In a recent piece of nuclear news easily overshadowed by the Iran deal, teh Center for Public Integrity (CPI) highlighted new information about South Africa’s refusal to give up six bombs worth of weapons-grade uranium. In 2011 and agian in 2013, President Obama wrote letters to South African President Jacob Zuma asking him to relinquish the country’s highly-enriched uranium, to blend it down to low-enriched uranium (LEU), or to transfer it to the United States in exchang for $5 million worth of LEU. President Zuma refused.