▁ 2 0 0 1 ▁spec ulated ▁that ▁Iran ▁had ▁manufact ured ▁and ▁stock p iled ▁chemical ▁weapons ▁– ▁including ▁bl ister , ▁blood , ▁ch oking , ▁and ▁probably ▁n erve ▁agents , ▁and ▁the ▁bomb s ▁and ▁art illery ▁shell s ▁to ▁deliver ▁them . ▁It ▁further ▁claimed ▁that ▁during ▁the ▁first ▁half ▁of ▁ 2 0 0 1 , ▁Iran ▁continued ▁to ▁seek ▁production ▁technology , ▁training , ▁expert ise , ▁equipment , ▁and ▁chemical s ▁from ▁entities ▁in ▁Russia ▁and ▁China ▁that ▁could ▁be ▁used ▁to ▁help ▁Iran ▁reach ▁its ▁goal ▁of ▁having ▁ind igen ous ▁n erve ▁agent ▁production ▁cap ability . ▁However ▁the ▁certain ty ▁of ▁this ▁assess ment ▁decl ined ▁and ▁in ▁ 2 0 0 7 ▁the ▁U . S . ▁Def ense ▁Int elligence ▁Agency ▁limited ▁its ▁public ▁assess ment ▁to ▁just ▁not ing ▁that ▁" I ran ▁has ▁a ▁large ▁and ▁growing ▁commercial ▁chemical ▁industry ▁that ▁could ▁be ▁used ▁to ▁support ▁a ▁chemical ▁agent ▁mobil ization ▁cap ability ." ▁ ▁Iran ▁is ▁a ▁sign atory ▁of ▁the ▁Chem ical ▁We ap ons ▁Convention , ▁which ▁b ans ▁chemical ▁weapons , ▁delivery ▁systems , ▁and ▁production ▁facilities . ▁Iran ▁has ▁re iter ated ▁its ▁commit ment ▁to ▁the ▁C W C ▁and ▁its ▁full ▁support ▁for ▁the ▁work ▁of ▁the ▁OP C W , ▁in ▁particular ▁in ▁view ▁of ▁the ▁considerable ▁suffering ▁these ▁weapons ▁have ▁caused ▁to ▁the ▁Iran ian ▁people . ▁Iran ▁has ▁not ▁made ▁any ▁declaration ▁of ▁a ▁weapons ▁stock p ile