The U.S. imposed a range of sanctions designed to exert new pressure against Iran and deter international business leaders from circumventing Washington’s existing punitive measures as talks continue over the country’s nuclear program. The steps announced Friday come amid growing concern in the Obama administration that Iran isn’t ready to make the concessions needed to clinch a nuclear deal. The U.S. Treasury and State departments said the sanctions will punish a bank that provides U.S. dollar bills to the Iranian government; a group that helped Iran evade sanctions on oil and petrochemicals; several transportation firms that helped deliver weapons and personnel to the Assad regime in Syria; and some individuals and organizations that support Iran’s nuclear program. The new measures put the U.S. in the delicate position of imposing new sanctions at the same time it is rolling back a series of existing measures following initial progress in international […]