This article discusses the latest attempts by the US Treasury Department to stop US firms from using the Iranian Central Bank. See http://www.ft.com/cms/s/0/efebdb30-f788-11dc-ac40-000077b07658,noOfParas=2,emailFormat=plainText,storyType=ultralight,dwp_uuid=fc3334c0-2f7a-11da-8b51-00000e2511c8,print=no,_i_email=y.html