American Civil Liberties Union (ACLU)
122 Maryland Ave. NE
Washington, DC 20002
(202) 544-1681

The ACLU is a national organization that works to defend the civil rights of Americans as guaranteed in the U.S. Constitution. The organization is critical of many antiterrorist bills, believing that such legislation would limit the rights and freedoms of citizens.

Anti-Defamation League of B'nai B'rith
100 Connecticut Ave. NW, Suite 1020
Washington, DC 20036
(202) 857-6660

This Jewish organization seeks to combat anti-Semitism and bigotry in its many forms in the United States and around the world. It has served as a watchdog agency, monitoring neo-Nazi and white supremacist groups.

Bureau of Alcohol, Tobacco, and Firearms (ATF)
650 Massachusetts Ave. NW, Suite 8100
Washington, DC 20226
(202) 927-7777

Part of the Treasury Department, the ATF enforces and administers laws relating to alcohol, tobacco, firearms, explosives, and destructive devices such as bombs. It also investigates criminal activities relating to such...