Julius and Ethel Rosenberg: The Jell-O Box, the Lie, and the Electric Chair
- Mar 6, 2024
- 9 min read
The evidence that sent Ethel Rosenberg to the electric chair came down, in the end, to a torn cardboard box and a sentence her own brother admitted, decades later, that he had made up. The cardboard box had once held Jell-O, and was used as a recognition signal between Soviet agents in 1945. The sentence was that Ethel had typed up stolen atomic bomb notes on a portable Remington typewriter. Her brother David Greenglass said it under oath in 1951. He spent the next fifty years walking around with it. In 2001 he finally admitted, on national television, that he'd never actually seen her do it. By then it didn't matter. Ethel had been dead for forty-eight years.
Julius and Ethel Rosenberg remain the only American civilians ever executed for espionage during peacetime. Their case became one of the defining controversies of the Cold War, and the documents released over the seventy years since their deaths have only made it murkier: Julius was almost certainly guilty. Ethel almost certainly was not guilty of what she was actually executed for. Nobody has ever fixed that.
The Network and the Bomb
Julius Rosenberg was an electrical engineer and a committed Communist, recruited as a Soviet asset around 1942 while working at the Army Signal Corps Engineering Laboratories. By 1944 he was running a network of sub-agents feeding industrial and military secrets to Moscow. Among them was his brother-in-law, David Greenglass, a machinist stationed at the Los Alamos National Laboratory, the secret heart of the Manhattan Project.
But Greenglass, an Army machinist with no scientific training, was never the most important source. That distinction belongs to Klaus Fuchs, a German-born British physicist working in the theoretical division at Los Alamos under Hans Bethe. Fuchs had genuine, deep technical knowledge of the bomb's implosion design, and he passed it to Moscow with far more precision and consequence than anything Greenglass could offer. The Manhattan Project produced the weapon that ended the war in the Pacific, and within a decade of Trinity, the Soviets had a working copy of it. Fuchs is a significant part of the reason why.
The Jell-O Box
In 1945, Julius Rosenberg needed a way for his Soviet contacts to identify David and Ruth Greenglass on sight in Albuquerque, where the couple was living near Los Alamos. His solution was almost charmingly low-tech: he cut the side panel off a box of Jell-O into an irregular jigsaw shape, kept one half, and gave the other to the Greenglasses. Whoever approached them carrying the matching piece was the courier.
That courier was Harry Gold, a Philadelphia chemist working for Soviet intelligence under the codename Raymond. In September 1945, Gold met the Greenglasses in their Albuquerque apartment, matched the torn cardboard, paid them $500 in cash, and walked away with a handwritten description and crude sketch of the bomb's implosion lens mould. The actual physical evidence, a facsimile of the box used at trial, is now held by the National Archives in New York, filed alongside passport photographs and childlike sketches of bomb components in a folder that remains one of the stranger collections in American legal history.
The Venona Project: The Cables That Cracked It Open
None of this would have surfaced when it did without the Venona Project, one of the most significant counterintelligence operations of the 20th century and, for decades, one of the least publicly known. Beginning in 1943, American Army cryptanalysts began intercepting and attempting to decrypt coded cable traffic between Soviet diplomatic missions in the United States and Moscow. The Soviets believed their one-time pad encryption was unbreakable. A wartime shortage led to some pads being reused, which gave American codebreakers, working in near-total secrecy for years, a crack to exploit.
One of the first decrypted cables to bear fruit was a 1944 report on the progress of the Manhattan Project, written by a Soviet source codenamed Rest. FBI investigation eventually identified Rest as Klaus Fuchs. When confronted by British authorities in January 1950, Fuchs confessed within weeks, named his courier as a man he knew only as Raymond, and the chain unravelled fast: Raymond was identified as Harry Gold, Gold's confession implicated David Greenglass, and Greenglass, arrested on 15 June 1950, gave up his own sister within days.
The Venona decryptions weren't declassified and released to the public until 1995, more than four decades after the Rosenbergs were executed. They confirmed that Julius Rosenberg, under the Soviet codename Antenna and later Liberal, was a real and active spy. They also confirmed something that should have changed the entire moral calculus of the case: Ethel Rosenberg was never assigned a KGB codename at all. The agency that ran Julius as an asset for years apparently didn't consider his wife operational enough to bother naming.
Roy Cohn and the Manufactured Witness
The prosecution's case against Ethel rested on one piece of testimony: that she had personally typed up Greenglass's handwritten notes on a portable Remington typewriter in the Rosenbergs' apartment. It was, in the words of journalist Sam Roberts, who later interviewed Greenglass at length, 'as good as a smoking gun in Ethel Rosenberg's hands.' Without it, the case against her was thin to the point of nonexistence.
The man who built that testimony was Roy Cohn, a 24-year-old assistant U.S. attorney who would go on to become one of the most notorious lawyers in American history, chief counsel to Senator Joseph McCarthy during the Army-McCarthy hearings, and decades later, a mentor and lawyer to a young Donald Trump in New York real estate circles. Cohn conducted the direct examination of David Greenglass at trial.
In December 2001, on CBS's 60 Minutes II, Greenglass was asked directly whether Cohn had pressured him to change his testimony. He said yes. He then admitted something far more damaging: he had never actually seen his sister type anything. 'I don't know who typed it, frankly, and to this day I can't remember that the typing took place,' he said. 'I had no memory of that at all, none whatsoever.' Pressed on why he'd said otherwise under oath, he was blunt: 'I would not sacrifice my wife and my children for my sister. How do you like that?' He told another interviewer simply: 'I sleep well.'
Grand jury transcripts released decades later, after a Freedom of Information fight led by the Rosenbergs' sons, confirmed the fabrication from another angle. Ruth Greenglass, David's wife, testified to the original grand jury that she herself had written the notes out in longhand. There was no mention of Ethel and a typewriter at all. The typewriter only entered the story by the time of the actual trial. Roy Cohn himself admitted in a 1986 interview, twenty-three years before his death, that the government had 'manufactured' some of the evidence used against the Rosenbergs.
The Trial and the Sentence
Julius and Ethel were convicted of conspiracy to commit espionage in March 1951. At sentencing, Judge Irving Kaufman went well beyond the charge itself, holding the couple personally responsible for American deaths in a war they had nothing to do with: 'I believe your conduct in putting into the hands of the Russians the A-bomb years before our best scientists predicted Russia would perfect the bomb has already caused, in my opinion, the Communist aggression in Korea, with the resultant casualties exceeding 50,000 and who knows but that millions more of innocent people may pay the price of your treason.'
FBI Director J. Edgar Hoover had actually recommended a 30-year sentence for Ethel rather than death, calculating that the threat of long imprisonment, separated from her two young sons, might eventually pressure her into naming other agents. Kaufman went further than even Hoover wanted. David Greenglass, whose testimony had done more than anyone else's to convict his sister, received 15 years and served just over nine.
Documents released in 1975 after the Meeropol brothers' FOIA requests revealed that Judge Kaufman had been secretly communicating with prosecutors throughout the trial, including discussing sentencing strategy before the verdict was even in. None of this was disclosed to the defence at the time.
Faced With a Choice, They Chose the Chair
The government offered both Rosenbergs a way out: name other agents, admit guilt, and live. They refused, issuing a joint statement that has since become one of the most quoted documents of the case: 'By asking us to repudiate the truth of our innocence, the government admits its own doubts concerning our guilt. We will not be coerced, even under pain of death, to bear false witness.'
Whether that was integrity or, as Greenglass later put it with characteristic lack of sentiment, 'stupidity,' depends entirely on whether you believe Ethel had anything to confess to in the first place. If the Venona evidence is right that she was never an active KGB asset, there was no information she could have traded for her life even if she'd wanted to.
19 June 1953
The Rosenbergs were executed at Sing Sing Prison on Friday, 19 June 1953. The date itself had been moved up from the original schedule specifically so the execution wouldn't fall on the Jewish Sabbath, a small bureaucratic detail that did nothing to soften the broader spectacle of two Jewish Americans being put to death for an offence many around the world viewed as politically manufactured.
Julius died first, with a single application of the electric chair. Ethel's execution went wrong. After the standard three shocks, attending physicians discovered her heart was still beating. Two further shocks were applied. Witnesses in the room reported smoke rising visibly from her head. The botched execution became, almost instantly, a symbol for clemency campaigners around the world of a punishment that had gone further than even its architects intended.
Pope Pius XII appealed for clemency. Protests took place across Western Europe. Albert Einstein and Jean-Paul Sartre both spoke out against the executions. President Eisenhower, backed by domestic public opinion that was considerably less sympathetic than the international response, declined to intervene.
The Funeral and the Orphans
Ethel and Julius were buried two days later at Wellwood Cemetery in Pinelawn, New York. The Times reported some 500 mourners inside the chapel and a crowd estimated at 10,000 standing outside in summer heat. Their lawyer Emanuel Bloch told the crowd that America was 'living under the heel of a military dictator garbed in civilian attire,' and described the Rosenbergs as having shown 'courage and heroism.'
Michael and Robert Rosenberg, ten and six years old, were left without parents and without immediate family willing to take them in, a measure of how toxic the case had made the Rosenberg name even within their own extended family. They moved through several state care arrangements before the boys' guardian, the Rosenbergs' own lawyer Emanuel Bloch, found them a permanent home. The Meeropols were not existing family friends. Bloch knew Abel Meeropol by reputation as the writer of 'Strange Fruit' and knew the couple were politically sympathetic to the Rosenbergs' cause. He arranged a meeting, approved of what he saw, and placed the boys with them in January 1954.
Before the adoption could be formally completed, Bloch died suddenly of a heart attack, and right-wing groups attempted to have the boys removed from the Meeropol household in the custody battle that followed. The adoption was eventually finalised regardless. Abel Meeropol was a teacher and lyricist, and the royalties from 'Strange Fruit,' the anti-lynching song made famous by Billie Holiday years before the Rosenberg case began, helped support the family. Both boys built careers, in economics and law respectively, had families of their own, and spent much of their adult lives pursuing the declassification fights that slowly, document by document, vindicated their mother.
Was Ethel Guilty of Anything?
The honest answer, drawing on everything declassified since, is complicated. A 1950 NSA memo, declassified in 2024 after another Meeropol family FOIA request, recorded that Soviet intelligence itself regarded Ethel as someone who 'knew about her husband's work, but that due to ill health did not engage in the work herself.' That's the Soviets' own internal assessment, written eleven days after her arrest, and it directly contradicts the version the American government put before a jury.
Morton Sobell, a co-defendant convicted alongside the Rosenbergs who served 17 years and always denied wrongdoing, finally admitted in 2008, at 91, that he and Julius had indeed passed military secrets to the Soviets. He maintained, as he always had, that Ethel was not an active participant. Most historians today accept that Julius was guilty of running a genuine and damaging espionage network. Almost none defend the specific evidence used to convict and execute Ethel. It's a pattern that recurs across Cold War espionage cases: the public verdict and the documented reality drift further apart with every decade of declassification.
In 2016, Michael and Robert Meeropol asked President Obama to formally exonerate their mother. He didn't act on it before leaving office. As of today, Ethel Rosenberg has never been exonerated by the United States government. The conviction stands on the books exactly as it did in 1951, built on testimony its own author spent his final decades trying, in his own halting and self-justifying way, to take back.
Sources
1. Why Ethel's Execution Was Wrongful, Rosenberg Fund for Children: https://www.rfc.org/why-ethels-execution-was-wrongful
2. The Facts About Ethel Rosenberg, Rosenberg Fund for Children: https://www.rfc.org/exoneratefactsheet
3. Fat Man, Little Boy, A Packet of Jell-O, National Archives Prologue Blog: https://prologue.blogs.archives.gov/2011/04/05/fat-man-little-boy-a-packet-of-jello/
4. Spies Who Spilled Atomic Bomb Secrets, Smithsonian Magazine: https://www.smithsonianmag.com/history/spies-who-spilled-atomic-bomb-secrets-127922660/
5. Trial of the Rosenbergs: An Account, Douglas O. Linder, Famous Trials: https://famous-trials.com/rosenberg/2228
6. Klaus Fuchs, Atomic Heritage Foundation: https://ahf.nuclearmuseum.org/ahf/profile/klaus-fuchs/
7. Atom Spy Case/Rosenbergs, Federal Bureau of Investigation: https://www.fbi.gov/history/cases-and-criminals/atom-spy-caserosenbergs
8. David Greenglass, Key Witness in Rosenberg Spying Case, Dies at 92, CBS News: https://www.cbsnews.com/news/david-greenglass-of-rosenberg-spying-case-dies
9. Cold War, Colder Brother, CBS News: https://cbsnews.com/news/cold-war-colder-brother
10. VENONA Project, National Security Agency: https://www.nsa.gov/news-features/declassified-documents/venona/
11. Ronald Radosh & Joyce Milton, The Rosenberg File: A Search for the Truth, Yale University Press, 1997
12. Sam Roberts, The Brother: The Untold Story of the Rosenberg Case, Random House, 2001
13. National Archives, Rosenberg Trial Transcripts: https://catalog.archives.gov/id/278469
