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 or sent them to the United States for internment. Brazil also restricted its Japanese Brazilian population. Although Japanese Americans in Hawaii comprised more than one third of the population, businessmen resisted their being interned or deported to mainland concentration camps, as they recognized their contributions to the economy. In the hysteria of the time, some mainland Congressmen (Hawaii was only a U.S. territory at the time, and did not have a voting representative or senator in Congress) promoted that all Japanese Americans and Japanese immigrants should be removed from Hawaii but were unsuccessful. An estimated 1,200 to 1,800 Japanese nationals