The U.S. representative to the Organisation for the Prohibition of Chemical Weapons, Kenneth Ward, stated that "the U.S. has had longstanding concerns that Iran maintains a chemical weapons program that it failed to declare to the OPCW. The U.S. is also concerned that Iran is pursuing Central Nervous System-Acting Chemicals for offensive purposes". He went on to cite three purported instances of declaration failures by Iran. Tehran dismissed the U.S. position as "groundless accusations... which we strongly reject", and Foreign Minister Zarif opined that the "U.S. wants to resort to international conventions to make allegations against Iran when it's made a policy of violating them itself". "WMD allegations", Zarif continued, "... is not just obscene, it's dangerous".
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