THE WASHINGTON TIMES More than 100 members of the violent street gang Mara Salvatrucha, or MS-13, have been arrested in a sweeping nationwide anti-gang initiative called "Operation Community Shield," including 25 in the Washington area and 10 in Baltimore. U.S. Immigration and Customs Enforcement (ICE) agents, working with state and local law-enforcement authorities, arrested members of the Central America-rooted gang -- this country's largest and most violent criminal organization -- in six cities on charges ranging from murder to immigration violations.