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 17, and Katsuji James Kanegawa, 21, during the December 1942 Manzanar Riot; James Hatsuaki Wakasa, 65, while walking near the perimeter wire of Topaz; and Shoichi James Okamoto, 30, during a verbal altercation with a sentry at the Tule Lake Segregation Center. Psychological injury was observed by Dillon S. Myer, director of the WRA camps. In June 1945, Myer described how the Japanese Americans had grown increasingly depressed, and overcome with feelings of helplessness and personal insecurity. Author Betty Furuta explains that the Japanese used "gaman," loosely meaning "perseverance", to overcome hardships; this was mistaken by non-Japanese as being introverted