Iran pulled out of technical-level denuclearization talks with six world powers Friday to protest the expansion of a U.S. blacklist of companies and individuals allegedly supporting Iran’s atomic program. Tehran said the U.S. move violates the spirit of last month’s groundbreaking agreement on Iran’s nuclear development. But the White House said the action taken Thursday to freeze the U.S. assets of firms and people in several other countries did not violate the agreement, and was based on existing sanctions. In the first major hurdle to the interim deal reached last month in Geneva, the United States targeted more than a dozen companies and individuals in Panama, Singapore, Ukraine and elsewhere for allegedly evading sanctions against Iran and maintaining covert business with Iran’s national tanker company. Other companies the U.S. accused of being involved directly in the proliferation of material useful for weapons of mass destruction were also blacklisted from […]