ankara unite state iran number one enemy tehran never succumb washington pressure multinational nuclear deal iran supreme leader ayatollah ali khamenei say televise speech thursday u.s. president donald trump break rank major power last month refuse formally certify iran compliance nuclear deal deal sanction iran lift exchange tehran curb nuclear work american president foolish remark people show depth america hostility towards entire iranian nation iran top authority khamenei tell group students america number one enemy nation since deal reach 2015 khamenei continue denounce unite state publicly suggest antagonism two countries since 1979 islamic revolution tehran would abate accord iran unite state sever diplomatic tie shortly revolution hardline students take 52 americans hostage 444 days iran mark anniversary american embassy seizure saturday trump call nuclear agreement reach predecessor barack obama bad deal ever negotiate adopt harsh approach iran nuclear ballistic missile program washington impose new sanction iran missile activity call tehran develop missiles capable deliver nuclear bomb iran say plan missile program solely defense purpose deal signatories britain france germany russia china european union say washington unilaterally cancel international accord enshrine u.n. resolution iranian officials repeatedly say tehran would stick nuclear accord long signatories respect warn consequences deal fall apart never accept bully nuclear deal ... americans use wickedness damage result nuclear talk khamenei say chant death america students retreat iran make america blatant impudent ... resistance option trump also accuse iran support terrorism middle east iran reject turn blame growth militant group islamic state policies unite state regional ally shi ite-dominated iran regional arch-rival u.s.-backed sunni saudi arabia involve proxy war across region back opposite side syria yemen iraq lebanon supreme leader khamenei say u.s. iran 's 'number one enemy