When the U.S. Department of Treasury imposed sanctions on three companies belonging to Denis Postovoy on Wednesday, it was yet another move to break up what U.S. authorities say was an international scheme to violate sanctions. A month earlier, on September 16, law enforcement officials arrested the 44-year-old Russian national in Sarasota, Florida. He was charged with conspiring to violate sanctions on Russia, commit smuggling, commit money laundering and defraud the United States. According to the indictment, Postovoy used an international network of companies to export dual-use microelectronic components from the United States to Russia –– potentially spare parts for