WASHINGTON, Feb 28 (Reuters) - Iran could make enough fissile for one nuclear bomb in "about 12 days," a top U. Under Secretary of Defense for Policy Colin Kahl made the comment to a House of Representatives hearing when pressed by a Republican lawmaker why the Biden administration had sought to revive the deal, the Joint Comprehensive Plan of Action (JCPOA)"Because Iran's nuclear progress since we left the JCPOA has been remarkable. , European and Israeli fears that Iran may seek an atomic bomb