part 2. Department of Homeland Security: U.S. Citizenship and Immigration Services; U.S. Department of Homeland Security, Office of the Inspector General; U.S. Department of Homeland Security; Cybersecurity and Infrastructure Security Agency
part 3. Department of Homeland Security: U.S. Customs and Border Protection; United States Coast Guard; U.S. Immigration and Customs Enforcement; Transportation Security Administration; United States Secret Service; Federal Emergency Management Agency.