U.S. Immigration and Customs Enforcement (ICE) enforces federal laws governing border control, customs, trade and immigration to promote homeland security and public safety. ICE was created in 2003 through a merger of the investigative and interior enforcement elements of the former U.S. Customs Service and the Immigration and Naturalization Service. ICE now has more than 20,000 employees in more than 400 offices in the United States and 46 foreign countries. The agency has an annual budget of approximately $6 billion, primarily devoted to two operational directorates — Enforcement and Removal Operations (ERO) and Homeland Security Investigations (HSI). These two operational directorates are supported by Management and Administration (M&A) and Office of the Principal Legal Advisor (OPLA) to advance the ICE mission.