Executive Order 9066: The order signed by President Franklin Roosevelt authorizing the internment of Japanese-Americans during WWII.
5th Amendment Due Process Clause: Part of the Constitution that prohibits government from depriving individuals of life, liberty, or property without due process; was argued in United States v. Korematsu.
Civil Liberties: Individual rights protected by law from unjust governmental interference; these were questioned in United States v. Korematsu.