On this day, 72 years ago, on June 19, 1953 (May 9, 1953 in the lunar calendar), the United States executed a spy who leaked the secrets of the atomic bomb. The Rosenberg couple held in a U.S. prison are about to be taken to the death row. They were executed by the electric chair on June 19 from 20:06 to 16. In 1950, the U.S. government filed charges against Julius Luxembourg and his wife Ethel Luxembourg. The accusation is that in June 1945, three months before the first atomic bomb exploded in Nagasaki, the Luxembourg couple provided atomic bomb making secrets to the Soviet Union. FBI Director Edgar Hoover condemned the Luxemburg couple as "the most important criminals of the 20th century." In 1951, the Luxembourg couple and one of their accomplices were convicted of "conspiracy to spy." After jury confirmation, Judge Irwin R. Kaufman pronounced the death sentence. On death row in New York's new prison, the Luxemburg couple spent two years on death row. During this period, lawyer Emmer-Klock repeatedly appealed against it, but all were rejected. More and more people were also demanding that the government release them, but on June 19, 1953, the Luxembourg couple were simultaneously sent to the electric chair. Before the execution, they once again declared that they were innocent. The case of the Luxembourg couple began in 1950. In the winter of the same year, German-born British physicist Klaus Fuchs mentioned in a confession submitted to the British spy agency that he had provided information about the making of the atomic bomb to a Soviet spy liaison while working on the "Manhattan Project" at the University of Colombia in New York and Los Alamos in New Mexico. After the FBI received the news, it immediately began to track this person down. and traced it to the head of a man named Greengrass. Greengrass is Ethel Luxemburg's younger brother. He and his wife Ruth, like the Luxemburg couple, are both members of the Communist Party of the United States. During World War II, the Soviet people were deeply moved by the spirit of sacrifice shown in their fight against the German fascist army on the Eastern Front. Before the end of the war, David Greinglass was transferred to Los Alamos to participate in the highly secret Manhattan Project, and Julius Luxemburg was very happy. As Ruth was about to leave to visit her husband, Julius asked Ruth to tell Greinglass about some secrets about the atomic bomb. Greengrass accepted Julius's request and in 1945 took the opportunity to return to New York on vacation to hand Julius several notebooks and sketches of the warhead model. After one meal, Julius Luxemburg walked into the kitchen and irregularly cut a piece of jelly in half. He gave half of it to Ruth and told her that a liaison would come to her, and that the contact signal was the other half of the jelly. Later, this contact signal became evidence of the Luxembourg couple's death sentence. Although the Luxemburg couple did not send information to enemy countries in 1945, but to wartime allies, they were still convicted of treason. In 1950, at the instigation of Senator Joseph McCarthy, a wave of anti-communism swept across the United States; the Korean War broke out: the United States lost its monopoly on the atomic bomb. In this situation, the accused atomic bomb spy has become the target of public and public opinion venting their anger. The testimony of Greengrass and others became incriminating evidence that killed the Luxembourg couple. While the couple appealed and asked for leniency from President Eisenhower, several prominent scientists pointed out that the intelligence given by David Greinglass to Julius Luxemburg was of little value to the Soviets. But Fuchs's confession eventually cost the Luxembourg couple their lives, but he survived. Julius Luxembourg Ethel Luxembourg (35) and her husband Julius (34) before being sentenced to death