Erdal Kuyumcu, the head of a New York-based metallurgical company, has been arrested on charges of illegally exporting a specialized powder to Iran, the Justice Department announced on March 1.  Kuyumcu, the CEO of Global Metallurgy LLC, was accused of exporting more than a thousand pounds of cobalt-nickel metallic powder to Iran via Turkey without an export license.  The metallic powder has aerospace, missile production, and nuclear applications.