Description: Over the past few years, the media have been filled with reports about worksite enforcement operations, commonly referred to as immigration raids. These operations represent the public face of efforts by the Department of Homeland Security to curtail the employment of unauthorized immigrants. According to 2006 estimates, there are some 7.8 million unauthorized workers in the U.S. civilian workforce. Enforcement activity by the Department of Labor (DOL) is also relevant to a discussion of federal efforts to curtail unauthorized employment.