beirut iran defense capabilities negotiable supreme leader ayatollah ali khamenei say wednesday remark make previously come amid increase pressure u.s. government tehran ballistic missile program tie iran unite state deteriorate u.s. president donald trump suffer another deep blow two weeks ago decide certify tehran comply 2015 nuclear pact warn might ultimately terminate iran react defiantly dismiss trump demand pact toughen last week iran elite revolutionary guard powerful military force country say ballistic missile program would accelerate despite u.s. european union pressure suspend defense capabilities strength country negotiable haggle khamenei cite say ceremony imam ali army officer academy tehran accord state media ramp rhetoric side raise specter possible military confrontation two countries recent months small boat revolutionary guard navy swarm close american warships gulf prompt u.s. navy fire flare warn shots landmark 2015 deal iran world power islamic republic agree curb nuclear program exchange lift number sanction u.s. senate consider new legislation could lead washington restore sanction iran test ballistic missile able carry warhead bar nuclear inspectors sit response khamenei say last week tehran would stick nuclear accord world power long signatories respect would shred deal washington pull iran say defense capabilities negotiable amid u.s. pressure