U.S. Immigration and Customs Enforcement agents have arrested two women in Miami and charged them with operating a major student visa fraud ring through which they tricked the federal government into granting more than 200 student visas to foreign nationals who were not students, agency officials and the U.S. attorney in Miami announced Thursday... An ICE media advisory called the operation the ``largest single visa fraud takedown in [the] agency's history.'' The visas involved foreign nationals fraudulently enrolled as students at Florida Language Institute...according to a grand jury indictment in the case. Whether foreign students show up for their assigned...