On Feb. 19, 1942, President Franklin Roosevelt signed Executive Order 9066 authorizing military authorities to exclude “any and all persons” from designated areas of the country as was necessary for national security. The result was the mass removal and internment of more than 120,000 men, women, and children of Japanese ancestry, some for up to three years, until the end of World War II. The online exhibit “A More Perfect Union: Japanese Americans & the U.S. Constitution,” from the Smithsonian Institution, examines this period in United States history from a number of perspectives, including immigration, removal, internment, loyalty, service, and justice. The site also features a special area for reflection by visitors. Classroom activities can be found under the Resources link at the bottom of the page, and these include suggestions for using the activity in elementary, middle, and high schools to teach about the exclusion orders and the internment process. In the wake of the Sept. 11 terrorist attacks on the United States and the reaction by the Bush administration, this site is a great opportunity for educators to compare how American wartime policy has evolved since World War II.