 In late 1993, Petterson was asked by officials in the Clinton administration to deliver a ultimatum to Sudan's Islamist leader, Hasan al-Turabi, and the country's president, Omar al-Bashir.The document contained a brief list of talking points that were designed to warn Sudan's top government officials about any involvement in alleged plots to kill U.S. diplomats working in Sudan.The alleged threats were based on evidence gathered by a foreign agent retained by the C.I.A., data which would be used to justify Petterson's reduction of American embassy personnel in Khartoum.