Iran's top nuclear official said Saturday that his country will enrich uranium and produce nuclear fuel in Iran despite the U.S.-led international drive to curb such efforts. "For me, there is no doubt that the process of producing nuclear fuel in Iran will be accomplished," Gholamreza Aghazadeh, head of the Atomic Organization of Iran, said during a press conference. "There is no doubt that we have to carry out uranium enrichment." Aghazadeh, who is also an Iranian vice president, gave no date for when the processes would start, but stressed they would do so at some stage.