Three men, including an Iranian-born chemical engineer living in Glendale, have been charged in an alleged scheme to smuggle sophisticated industrial components into Iran that could be used in the development of a nuclear weapon, authorities said Wednesday. The case, which comes as the U.S. is rallying allies to block Iran's nuclear ambitions, has drawn interest at the highest levels of government, an official with Immigration and Customs Enforcement told The Times. Authorities allege the men were attempting to smuggle high-grade vacuum pumps and other items into Iran in violation of federal trade laws regulating the export of some technology...