Robert Rosenberg, the son of Ethel Rosenberg and Julius Rosenberg, was born in New York City in 1947. Two years later, Harry Gold was arrested by the FBI and accused of spying for the Soviet Union. He named Ethel's brother, David Greenglass, as being a member of the spy ring. Under questioning, he admitted acting as a spy and named Robert's father as one of his contacts. He denied that his sister had been involved but confessed that his wife, Ruth Greenglass, had been used as a courier.
Julius Rosenberg was arrested but refused to implicate anybody else in spying for the Soviet Union. Joseph McCarthy had just launched his attack on a so-called group of communists based in Washington. J. Edgar Hoover, saw the arrest of Rosenberg as a means of getting good publicity for the FBI. Hoover sent a memorandum to the US attorney general Howard McGrath saying: "There is no question that if Julius Rosenberg would furnish details of his extensive espionage activities it would be possible to proceed against other individuals. Proceeding against his wife might serve as a lever in these matters."
J. Edgar Hoover ordered the arrest of Ethel Rosenberg and Robert and his brother Michael Rosenberg were looked after by her mother, Tessie Greenglass. She found this very difficult and after three months the boys were sent to the Hebrew Children's Home. Later that year, Julius' mother, Sophie Rosenberg, removed them from the children's home and decided to care for the boys herself.
Ten days before the start of the trial of the Rosenbergs the FBI re-interviewed David Greenglass. He was offered a deal if he provided information against Ethel Rosenberg. This included a promise not to charge Ruth Greenglass with being a member of the spy ring. Greenglass now changed his story. In his original statement, he said that he handed over atomic information to Julius Rosenberg on a street corner in New York. In his new interview, Greenglass claimed that the handover had taken place in the living room of the Rosenberg's New York flat. In her FBI interview Ruth argued that "Julius then took the info into the bathroom and read it, and when he came out he told (Ethel) she had to type this info immediately. Ethel then sat down at the typewriter... and proceeded to type info which David had given to Julius".
The trial of the Rosenbergs began on 6th March 1951. The jury believed the evidence of David Greenglass and Ruth Greenglass and both Julius and his wife, Ethel Rosenberg, were found guilty and sentenced to death. A large number of people were shocked by the severity of the sentence as they had not been found guilty of treason. In fact, they had been tried under the terms of the Espionage Act that had been passed in 1917 to deal with the American anti-war movement.
Afterwards it became clear that the government did not believe the Rosenbergs would be executed. J. Edgar Hoover, head of the FBI, had warned that history would not be kind to a government responsible for orphaning the couple's two young sons on such poor evidence. Rumours began to circulate that the government would be willing to spare the couple's life if they confessed and gave evidence about other American Communist Party spies.
The case created a great deal of controversy in Europe where it was argued that the Rosenbergs were victims of anti-semitism and McCarthyism. Nobel prize-winner, Jean-Paul Sartre, called the case "a legal lynching which smears with blood a whole nation".
Julius Rosenberg and Ethel Rosenberg remained on death row for twenty-six months. They both refused to confess and provide evidence against others and they were eventually executed on 19th June, 1953. As one political commentator pointed out, they died because they refused to confess and name others.
Robert Meeropol later revealed: "My parents' last letter to me and my brother stands out for me. They wrote that they died secure in the knowledge that others would carry on after them. And I think that has multiple meanings. I think it meant, on a personal level to me and my brother, that other people would take care of us after they were no longer able to do so. But I also think it meant on the political level their political beliefs, the principles that they stood up for, their refusal to lie, their refusal to be pawns of the McCarthyite hysteria, in other words their refusal to be used to attack the movements that they believed in - that even though they were no longer able to carry on those struggles, others would be able to carry them on their absence. And I saw that as a call for me to do the same."
Joanna Moorhead later reported: "From the time of their parents' arrests, and even after the execution, they (Rosenberg's two sons) were passed from one home to another - first one grandmother looked after them, then another, then friends. For a brief spell, they were even sent to a shelter. It seems hard for us to understand, but the paranoia of the McCarthy era was such that many people - even family members - were terrified of being connected with the Rosenberg children, and many people who might have cared for them were too afraid to do so."
Abe Meeropol and his wife Anne eventually agreed to adopt Robert and Michael Rosenberg. According to Robert: "Abel didn't get any work as a writer throughout most of the 1950s... I can't say he was blacklisted, but it definitely looks as though he was at least greylisted."