The Department of Homeland Security was formed after the terrorist attacks of September 11, 2001, as part of a national effort to safeguard the United States against terrorism. Missions include preventing terrorism and enhancing security, managing borders, administering immigration laws, securing cyberspace, and ensuring disaster resilience. Oversees U.S. Immigration and Customs Enforcement, U.S. Citizenship and Immigration Services, Federal Law Enforcement Training Centers, Federal Protective Services, U.S. Customs and Border Protection, Transportation Security Administration (TSA), U.S. Coast Guard, U.S. Secret Service, and Federal Emergency Management Agency (FEMA).