U.S. Department of Homeland Security (DHS)
http://www.dhs.gov/index.shtm
U. S. Customs and Border Protection (CBP)
http://www.cbp.gov/xp/cgov/home.xml
U.S.Customs-Trade Partnership Against Terrorism (C-TPAT)
http://www.cbp.gov/xp/cgov/trade/cargo_security/ctpat/
U.S. Transportation Security Administration (TSA)
http://www.tsa.gov/index.shtm
TSA Air Cargo
http://www.tsa.gov/what_we_do/tsnm/air_cargo/index.shtm
TSA Transportation Worker Identification Credential (TWICTM)
http://www.tsa.gov/what_we_do/layers/twic/index.shtm
U.S. Food and Drug Administration (FDA)
http://www.fda.gov/
U.S. Federal Bureau of Investigation (FBI)
http://www.fbi.gov/
Federal Communications Commission (FCC)
http://www.fcc.gov/
Department of Transportation (DOT)
http://www.dot.gov/new/index.htm
Department of State Overseas Advisory Council (OSAC)
http://www.osac.gov/
U.S. Secret Service
http://www.secretservice.gov/
