It has become increasingly clear that Iran is making rapid progress toward attaining a nuclear weapons capability as U.S. officials have confirmed the presence of various nuclear sites that Tehran has failed to disclose
Tehran is the center of Iran's nuclear industry.
( z1 center :mod ( z2 industry :mod ( z3 nucleus ) :poss ( z4 country :name ( z5 name :op "Iran" ) ) ) :domain ( z6 city :name ( z7 name :op "Tehran" ) ) )