The Justice Department filed another lawsuit against immigration practices by Arizona authorities, saying Monday that a network of community colleges acted illegally in requiring noncitizens to provide their green cards before they could be hired for jobs. The suit against the Phoenix area Maricopa Community Colleges was filed less than two months after the Justice Department sued Arizona and Gov. Jan Brewer (R) over the state's new immigration law. It also comes as the department is investigating Joe Arpaio, the sheriff in Maricopa County, who is known for tough immigration enforcement. In Monday's lawsuit, Justice officials said the colleges discriminated...