Which are the primary DHS components involved in border security and immigration enforcement?

• A. FBI, CIA, NSA.
• B. TSA, DHS HQ, DHS OIG.
• C. FEMA, NOAA, NIST.
• D. U.S. Customs and Border Protection (CBP), U.S. Immigration and Customs Enforcement (ICE), U.S. Citizenship and Immigration Services (USCIS).

Answer: (D)

The main idea here is identifying which DHS components are responsible for border security and immigration enforcement. The three agencies that fit this role are U.S. Customs and Border Protection, U.S. Immigration and Customs Enforcement, and U.S. Citizenship and Immigration Services. CBP handles border control and inspections at ports of entry, aiming to secure the borders while facilitating lawful travel and trade. ICE takes on enforcement inside the country, handling investigations related to illegal entry and removal of immigration violators. USCIS focuses on adjudicating immigration benefits, such as visas, green cards, and naturalization, rather than conducting enforcement.

Other options mix agencies that aren’t primarily tasked with border security or immigration enforcement. The FBI, CIA, and NSA have security and intelligence roles but aren’t the core border- and immigration-focused components within DHS. TSA concentrates on transportation security, while DHS headquarters and the DHS OIG are administrative or oversight bodies. FEMA, NOAA, and NIST deal with disasters, weather, and standards, not border enforcement.