Did the U.S. government have the right to round up and detain Japanese American citizens during World War II? Did they present a danger and did the U.S. government act reasonably. Fred Korematsu didn't think so. After Franklin Roosevelt issued Executive Order 9066 Korematsu had plastic surgery and tried to conceal his identity. Korematsu was arrested and convicted of violating the local Civilian Exclusion order. He appealed to the Supreme court. The Supreme court upheld the conviction ruling that the government can take extraordinary measures in times of war. It was later looked on as a national shame.