Third and fourth terms of the presidency of Franklin D. Roosevelt well-defended island of Iwo Jima, taking control of that island the following month. On April 1, the U.S. landed on Okinawa Island, the largest of the Ryukyu Islands. The Japanese allowed the Americans to land on the island before launching a fierce attack that included "kamikaze" suicide attacks by Japanese aircraft. Japanese forces on Okinawa held out until June 1945; U.S. forces suffered over 60,000 casualties during the operation. In late 1943, Roosevelt, Churchill, and Stalin agreed to meet to discuss strategy and post-war plans at the Tehran Conference, which marked Roosevelt's first face-to-face meeting with Stalin. At the conference,
Internment of Japanese Americans related to the Japanese American experience. On October 1, 1987, the Smithsonian Institution National Museum of American History opened an exhibition called, "A More Perfect Union: Japanese Americans and the U.S. Constitution". The exhibition examined the Constitutional process by considering the experiences of Americans of Japanese ancestry before, during, and after World War II. On view were more than 1,000 artifacts and photographs relating to the experiences of Japanese Americans during World War II. The exhibition closed on January 11, 2004. On November 8, 2011, the National Museum of American History launched an online exhibition of the same name with