U.S. Immigration and Customs Enforcement is the principal investigative arm of the U.S. Department of Homeland Security (DHS) and the second largest investigative agency in the federal government. Created in 2003 through a merger of the investigative and interior enforcement elements of the U.S. Customs Service and the Immigration and Naturalization Service, ICE now has more than 20,000 employees in offices in all 50 states and 47 foreign countries.