Iran still seems to control a stockpile of highly enriched uranium. If enriched further, this material could be used to build several nuclear bombs. U.S. Vice President J.D. Vance has acknowledged the risk and promised that Washington will act in the coming weeks. Iran still seems to control a stockpile of highly enriched uranium. If enriched further, this material could be used to build several nuclear bombs. U.S. Vice President J.D. Vance has acknowledged the risk and promised that Washington will act in the coming weeks.