Science
Richard L. Garwin, a Creator of the Hydrogen Bomb, Dies at 97
Richard L. Garwin, an architect of America’s hydrogen bomb, who shaped defense policies for postwar governments and laid the groundwork for insights into the structure of the universe as well as for medical and computer marvels, died on Tuesday at his home in Scarsdale, N.Y. He was 97.
His death was confirmed by his son Thomas.
A polymathic physicist and geopolitical thinker, Dr. Garwin was only 23 when he built the world’s first fusion bomb. He later became a science adviser to many presidents, designed Pentagon weapons and satellite reconnaissance systems, argued for a Soviet-American balance of nuclear terror as the best bet for surviving the Cold War, and championed verifiable nuclear arms control agreements.
While his mentor, the Nobel laureate Enrico Fermi, called him “the only true genius I have ever met,” Dr. Garwin was not the father of the hydrogen bomb. The Hungarian-born physicist Edward Teller and the Polish mathematician Stanislaw Ulam, who developed theories for a bomb, may have greater claims to that sobriquet.
In 1951-52, however, Dr. Garwin, at the time an instructor at the University of Chicago and just a summer consultant at the Los Alamos National Laboratory in New Mexico, designed the actual bomb, using the Teller-Ulam ideas. An experimental device code-named Ivy Mike, it was shipped to the Western Pacific and tested on an atoll in the Marshall Islands.
Intended only to prove the fusion concept, the device did not even resemble a bomb. It weighed 82 tons, was undeliverable by airplane and looked like a gigantic thermos bottle. Soviet scientists, who did not test a comparable device until 1955, derisively called it a thermonuclear installation.
But at the Enewetak Atoll on Nov. 1, 1952, it spoke: An all-but-unimaginable fusion of atoms set off a vast, instant flash of blinding light, soundless to distant observers, and a fireball two miles wide with a force 700 times greater than the atomic bomb that destroyed Hiroshima in 1945. Its mushroom cloud soared 25 miles and expanded to 100 miles across.
Because secrecy shrouded the development of America’s thermonuclear weapons programs, Dr. Garwin’s role in creating the first hydrogen bomb was virtually unknown for decades outside a small circle of government defense and intelligence officials. It was Dr. Teller, whose name had long been associated with the bomb, who first publicly credited him.
“The shot was fired almost precisely according to Garwin’s design,” Dr. Teller said in a 1981 statement that acknowledged the crucial role of the young prodigy. Still, that belated recognition got little notice, and Dr. Garwin long remained unknown publicly.
Compared with later thermonuclear weapons, Dr. Garwin’s bomb was crude. Its raw power nonetheless recalled films of the first atomic bomb test in New Mexico in 1945, and the appalled reaction of its creator, J. Robert Oppenheimer, reflecting upon the sacred Hindu text of the Bhagavad Gita: “Now I am become Death, the destroyer of worlds.”
For Dr. Garwin, it was something less.
“I never felt that building the hydrogen bomb was the most important thing in the world, or even in my life at the time,” he told Esquire magazine in 1984. Asked about any feelings of guilt, he said: “I think it would be a better world if the hydrogen bomb had never existed. But I knew the bombs would be used for deterrence.”
A Pivot to I.B.M.
Although the first hydrogen bomb was constructed to his specifications, Dr. Garwin was not even present to witness its detonation at Enewetak. “I’ve never seen a nuclear explosion,” he said in an interview for this obituary in 2018. “I didn’t want to take the time.”
After his success on the hydrogen bomb project, Dr. Garwin said, he found himself at a crossroads in 1952. He could return to the University of Chicago, where he had earned his doctorate under Fermi and was now an assistant professor, with the promise of life at one of the nation’s most prestigious academic institutions.
Or he could accept a far more flexible job at the International Business Machines Corporation. It offered a faculty appointment and use of the Thomas J. Watson Laboratory at Columbia University, with wide freedom to pursue his research interests. It would also let him continue to work as a government consultant at Los Alamos and in Washington.
He chose the I.B.M. deal, and it lasted for four decades, until his retirement.
For I.B.M., Dr. Garwin worked on an endless stream of pure and applied research projects that yielded an astonishing array of patents, scientific papers and technological advances in computers, communications and medicine. His work was crucial in developing magnetic resonance imaging, high-speed laser printers and later touch-screen monitors.
A dedicated maverick, Dr. Garwin worked hard for decades to advance the hunt for gravitational waves — ripples in the fabric of space-time that Einstein had predicted. In 2015, the costly detectors he backed were able to successfully observe the ripples, opening a new window on the universe.
Meantime, Dr. Garwin continued to work for the government, consulting on national defense issues. As an expert on weapons of mass destruction, he helped select priority Soviet targets and led studies on land, sea and air warfare involving nuclear-armed submarines, military and civilian aircraft, and satellite reconnaissance and communication systems. Much of his work continued to be secret, and he remained largely unknown to the public.
He became an adviser to such Presidents as Dwight D. Eisenhower, John F. Kennedy, Lyndon B. Johnson, Richard M. Nixon, Jimmy Carter and Bill Clinton. He also became known as a voice against President Ronald Reagan’s proposals for a space-based missile system, popularly called Star Wars, to defend the nation against nuclear attack. It was never built.
One of Dr. Garwin’s celebrated battles had nothing to do with national defense. In 1970, as a member of Nixon’s science advisory board, he ran afoul of the president’s support for development of the supersonic transport plane. He concluded that the SST would be expensive, noisy, bad for the environment and a commercial dud. Congress dropped its funding. Britain and France subsidized the development of their own SST, the Concorde, but Dr. Garwin’s predictions proved largely correct, and interest faded.
Clashes With Military
A small, professorial man with thinning flyaway hair and a gentle voice more suited to college lectures than a congressional hot seat, Dr. Garwin became an almost legendary figure in the defense establishment, giving speeches, writing articles and testifying before lawmakers on what he called misguided Pentagon choices.
Some of his feuds with the military were bitter and long-running. They included fights over the B-1 bomber, the Trident nuclear submarine and the MX missile system, a network of mobile, land-based intercontinental ballistic missiles that were among the most lethal weapons in history. All eventually joined America’s vast arsenal.
While Dr. Garwin was frustrated by such setbacks, he pressed ahead. His core message was that America should maintain a strategic balance of nuclear power with the Soviet Union. He opposed any weapon or policy that threatened to upset that balance, because, he said, it kept the Russians in check. He liked to say that Moscow was more interested in live Russians than dead Americans.
Dr. Garwin supported reductions of nuclear arsenals, including the 1979 Strategic Arms Limitation Treaty (SALT II), negotiated by President Carter and Leonid Brezhnev, the Soviet premier. But Dr. Garwin insisted that mutually assured destruction was the key to keeping the peace.
In 2021, he joined 700 scientists and engineers, including 21 Nobel laureates, who signed an appeal asking President Joseph R. Biden Jr. to pledge that the United States would never be the first to use nuclear weapons in a conflict. Their letter also called for an end to the American practice of giving the president sole authority to order the use of nuclear weapons; a curb on that authority, they said, would be “an important safeguard against a possible future president who is unstable or who orders a reckless attack.”
The ideas were politically delicate, and Mr. Biden made no such pledge.
Dr. Garwin told Quest magazine in 1981, “The only thing nuclear weapons are good for, and have ever been good for, is massive destruction, and by that threat deterring nuclear attack: If you slap me, I’ll clobber you.”
A Whiz Kid at 5
Richard Lawrence Garwin was born in Cleveland on April 19, 1928, the older of two sons of Robert and Leona (Schwartz) Garwin. His father was a teacher of electronics at a technical high school during the day and a projectionist in a movie theater at night. His mother was a legal secretary. At an early age, Richard, called Dick, showed remarkable intelligence and technical ability. By 5, he was repairing family appliances.
He and his brother, Edward, attended public schools in Cleveland. Dick graduated at 16 from Cleveland Heights High School in 1944 and earned a bachelor’s degree in physics in 1947 from what is now Case Western Reserve University.
In 1947, he married Lois Levy. She died in 2018. In addition to his son Thomas, he is survived by another son, Jeffrey; a daughter, Laura; five grandchildren; and one great-grandchild.
Under Fermi’s tutelage at the University of Chicago, Dr. Garwin earned a master’s degree in 1948 and a doctorate in 1949, scoring the highest marks on doctoral exams ever recorded by the university. He then joined the faculty, but at Fermi’s urging spent his summers at the Los Alamos lab, where his H-bomb work unfolded.
After retiring in 1993, Dr. Garwin chaired the State Department’s Arms Control and Nonproliferation Advisory Board until 2001. He served in 1998 on the Commission to Assess the Ballistic Missile Threat to the United States.
Dr. Garwin’s home in Scarsdale is not far from his longtime base at the I.B.M. Watson Labs, which had moved in 1970 from Columbia University to Yorktown Heights, in Westchester County.
He held faculty appointments at Harvard and Cornell as well as Columbia. He held 47 patents, wrote some 500 scientific research papers and wrote many books, including “Nuclear Weapons and World Politics” (1977, with David C. Gompert and Michael Mandelbaum), and “Megawatts and Megatons: A Turning Point in the Nuclear Age?” (2001, with Georges Charpak).
He was the subject of a biography, “True Genius: The Life and Work of Richard Garwin, the Most Influential Scientist You’ve Never Heard Of” (2017), by Joel N. Shurkin.
His many honors included the 2002 National Medal of Science, the nation’s highest award for science and engineering achievements, given by President George W. Bush, and the Presidential Medal of Freedom, the nation’s highest civilian award, bestowed by President Barack Obama in 2016.
“Ever since he was a Cleveland kid tinkering with his father’s movie projectors, he’s never met a problem he didn’t want to solve,” Mr. Obama said in a lighthearted introduction at the White House. “Reconnaissance satellites, the M.R.I., GPS technology, the touch-screen — all bear his fingerprints. He even patented a mussel washer for shellfish — that I haven’t used. The other stuff I have.”
William J. Broad and Ash Wu contributed reporting.
Science
Diablo Canyon clears last California permit hurdle to keep running
Central Coast Water authorities approved waste discharge permits for Diablo Canyon nuclear plant Thursday, making it nearly certain it will remain running through 2030, and potentially through 2045.
The Pacific Gas & Electric-owned plant was originally supposed to shut down in 2025, but lawmakers extended that deadline by five years in 2022, fearing power shortages if a plant that provides about 9 percent the state’s electricity were to shut off.
In December, Diablo Canyon received a key permit from the California Coastal Commission through an agreement that involved PG&E giving up about 12,000 acres of nearby land for conservation in exchange for the loss of marine life caused by the plant’s operations.
Today’s 6-0 vote by the Central Coast Regional Water Board approved PG&E’s plans to limit discharges of pollutants into the water and continue to run its “once-through cooling system.” The cooling technology flushes ocean water through the plant to absorb heat and discharges it, killing what the Coastal Commission estimated to be two billion fish each year.
The board also granted the plant a certification under the Clean Water Act, the last state regulatory hurdle the facility needed to clear before the federal Nuclear Regulatory Commission (NRC) is allowed to renew its permit through 2045.
The new regional water board permit made several changes since the last one was issued in 1990. One was a first-time limit on the chemical tributyltin-10, a toxic, internationally-banned compound added to paint to prevent organisms from growing on ship hulls.
Additional changes stemmed from a 2025 Supreme Court ruling that said if pollutant permits like this one impose specific water quality requirements, they must also specify how to meet them.
The plant’s biggest water quality impact is the heated water it discharges into the ocean, and that part of the permit remains unchanged. Radioactive waste from the plant is regulated not by the state but by the NRC.
California state law only allows the plant to remain open to 2030, but some lawmakers and regulators have already expressed interest in another extension given growing electricity demand and the plant’s role in providing carbon-free power to the grid.
Some board members raised concerns about granting a certification that would allow the NRC to reauthorize the plant’s permits through 2045.
“There’s every reason to think the California entities responsible for making the decision about continuing operation, namely the California [Independent System Operator] and the Energy Commission, all of them are sort of leaning toward continuing to operate this facility,” said boardmember Dominic Roques. “I’d like us to be consistent with state law at least, and imply that we are consistent with ending operation at five years.”
Other board members noted that regulators could revisit the permits in five years or sooner if state and federal laws changes, and the board ultimately approved the permit.
Science
Deadly bird flu found in California elephant seals for the first time
The H5N1 bird flu virus that devastated South American elephant seal populations has been confirmed in seals at California’s Año Nuevo State Park, researchers from UC Davis and UC Santa Cruz announced Wednesday.
The virus has ravaged wild, commercial and domestic animals across the globe and was found last week in seven weaned pups. The confirmation came from the U.S. Department of Agriculture’s National Veterinary Services Laboratory in Ames, Iowa.
“This is exceptionally rapid detection of an outbreak in free-ranging marine mammals,” said Professor Christine Johnson, director of the Institute for Pandemic Insights at UC Davis’ Weill School of Veterinary Medicine. “We have most likely identified the very first cases here because of coordinated teams that have been on high alert with active surveillance for this disease for some time.”
Since last week, when researchers began noticing neurological and respoiratory signs of the disease in some animals, 30 seals have died, said Roxanne Beltran, a professor of ecology and evolutionary biology at UC Santa Cruz. Twenty-nine were weaned pups and the other was an adult male. The team has so far confirmed the virus in only seven of the dead pups.
Infected animals often have tremors convulsions, seizures and muscle weakness, Johnson said.
Beltran said teams from UC Santa Cruz, UC Davis and California State Parks monitor the animals 260 days of the year, “including every day from December 15 to March 1” when the animals typically come ashore to breed, give birth and nurse.
The concerning behavior and deaths were first noticed Feb. 19.
“This is one of the most well-studied elephant seal colonies on the planet,” she said. “We know the seals so well that it’s very obvious to us when something is abnormal. And so my team was out that morning and we observed abnormal behaviors in seals and increased mortality that we had not seen the day before in those exact same locations. So we were very confident that we caught the beginning of this outbreak.”
In late 2022, the virus decimated southern elephant seal populations in South America and several sub-Antarctic Islands. At some colonies in Argentina, 97% of pups died, while on South Georgia Island, researchers reported a 47% decline in breeding females between 2022 and 2024. Researchers believe tens of thousands of animals died.
More than 30,000 sea lions in Peru and Chile died between 2022 and 2024. In Argentina, roughly 1,300 sea lions and fur seals perished.
At the time, researchers were not sure why northern Pacific populations were not infected, but suspected previous or milder strains of the virus conferred some immunity.
The virus is better known in the U.S. for sweeping through the nation’s dairy herds, where it infected dozens of dairy workers, millions of cows and thousands of wild, feral and domestic mammals. It’s also been found in wild birds and killed millions of commercial chickens, geese and ducks.
Two Americans have died from the virus since 2024, and 71 have been infected. The vast majority were dairy or commercial poultry workers. One death was that of a Louisiana man who had underlying conditions and was believed to have been exposed via backyard poultry or wild birds.
Scientists at UC Santa Cruz and UC Davis increased their surveillance of the elephant seals in Año Nuevo in recent years. The catastrophic effect of the disease prompted worry that it would spread to California elephant seals, said Beltran, whose lab leads UC Santa Cruz’s northern elephant seal research program at Año Nuevo.
Johnson, the UC Davis researcher, said the team has been working with stranding networks across the Pacific region for several years — sampling the tissue of birds, elephant seals and other marine mammals. They have not seen the virus in other California marine mammals. Two previous outbreaks of bird flu in U.S. marine mammals occurred in Maine in 2022 and Washington in 2023, affecting gray and harbor seals.
The virus in the animals has not yet been fully sequenced, so it’s unclear how the animals were exposed.
“We think the transmission is actually from dead and dying sea birds” living among the sea lions, Johnson said. “But we’ll certainly be investigating if there’s any mammal-to-mammal transmission.”
Genetic sequencing from southern elephant seal populations in Argentina suggested that version of the virus had acquired mutations that allowed it to pass between mammals.
The H5N1 virus was first detected in geese in China in 1996. Since then it has spread across the globe, reaching North America in 2021. The only continent where it has not been detected is Oceania.
Año Nuevo State Park, just north of Santa Cruz, is home to a colony of some 5,000 elephant seals during the winter breeding season. About 1,350 seals were on the beach when the outbreak began. Other large California colonies are located at Piedras Blancas and Point Reyes National Sea Shore. Most of those animals — roughly 900 — are weaned pups.
It’s “important to keep this in context. So far, avian influenza has affected only a small proportion of the weaned at this time, and there are still thousands of apparently healthy animals in the population,” Beltran said in a press conference.
Public access to the park has been closed and guided elephant seal tours canceled.
Health and wildlife officials urge beachgoers to keep a safe distance from wildlife and keep dogs leashed because the virus is contagious.
Science
When slowing down can save a life: Training L.A. law enforcement to understand autism
Kate Movius moved among a roomful of Los Angeles County sheriff’s deputies, passing out a pop trivia quiz and paper prism glasses.
She told them to put on the vision-distorting glasses, and to write with their nondominant hand. As they filled out the tests, Movius moved about the City of Industry classroom pounding abruptly on tables. Then came the cowbell. An aide flashed the overhead lights on and off at random. The goal was to help the deputies understand the feeling of sensory overwhelm, which many autistic people experience when incoming stimulation exceeds their capacity to process.
“So what can you do to assist somebody, or de-escalate somebody, or get information from someone who suffers from a sensory disorder?” Movius asked the rattled crowd afterward. “We can minimize sensory input. … That might be the difference between them being able to stay calm and them taking off.”
Movius, founder of the consultancy Autism Interaction Solutions, is one of a growing number of people around the U.S. working to teach law enforcement agencies to recognize autistic behaviors and ensure that encounters between neurodevelopmentally disabled people and law enforcement end safely.
She and City of Industry Mayor Cory Moss later passed out bags filled with tools donated by the city to aid interactions: a pair of noise-damping headphones to decrease auditory input, a whiteboard, a set of communication cards with words and images to point to, fidget toys to calm and distract.
“The thing about autistic behavior when it comes to law enforcement is a lot of it may look suspicious, and a lot of it may feel very disrespectful,” said Movius, who is also the parent of an autistic 25-year-old man. Responding officers, she said, “are not coming in thinking, ‘Could this be a developmentally disabled person?’ I would love for them to have that in the back of their minds.”
A sheriff’s deputy reads a pamphlet on autism during the training program.
(Genaro Molina / Los Angeles Times)
Autism spectrum disorder is a developmental condition that manifests differently in nearly every person who has it. Symptoms cluster around difficulties in communication, social interaction and sensory processing.
An autistic person stopped by police might hold the officer’s gaze intensely or not look at them at all. They may repeat a phrase from a movie, repeat the officer’s question or temporarily lose their ability to speak. They might flee.
All are common involuntary responses for an autistic person in a stressful situation, which a sudden encounter with law enforcement almost invariably is. To someone unfamiliar with the condition, all could be mistaken for intoxication, defiance or guilt.
Autism rates in the U.S. have increased nearly fivefold since the Centers for Disease Control began tracking diagnoses in 2000, a rise experts attribute to broadening diagnostic criteria and better efforts to identify children who have the condition.
The CDC now estimates that 1 in 31 U.S. 8-year-olds is autistic. In California, the rate is closer to 1 in 22 children.
As diverse as the autistic population is, people across the spectrum are more likely to be stopped by law enforcement than neurotypical peers.
About 15% of all people in the U.S. ages 18 to 24 have been stopped by police at some point in their lives, according to federal data. While the government doesn’t track encounters for disabled people specifically, a separate study found that 20% of autistic people ages 21 to 25 have been stopped, often after a report or officer observation of a person behaving unusually.
Some of these encounters have ended in tragedy.
In 2021, Los Angeles County sheriff’s deputies shot and permanently paralyzed a deaf autistic man after family members called 911 for help getting him to a hospital.
Isaias Cervantes, 25, had become distressed about a shopping trip and started pushing his mother, his family’s attorney said at the time. He resisted as two deputies attempted to handcuff him and one of the deputies shot him, according to a county report.
In 2024, Ryan Gainer’s family called 911 for support when the 15-year-old became agitated. Responding San Bernardino County sheriff‘s deputies shot and killed him outside his Apple Valley home.
Last year, police in Pocatello, Idaho, shot Victor Perez, 17, through a chain-link fence after the nonspeaking teenager did not heed their shouted commands. He died from his injuries in April.
Sheriff’s deputies take a trivia quiz using their non-writing hands, while wearing vision-distorting glasses, as Kate Movius, standing left, and Industry Mayor Cory Moss, right, ring cowbells. The idea was to help them understand the sensory overwhelm some autistic people experience.
(Genaro Molina / Los Angeles Times)
As early as 2001, the FBI published a bulletin on police officers’ need to adjust their approach when interacting with autistic people.
“Officers should not interpret an autistic individual’s failure to respond to orders or questions as a lack of cooperation or as a reason for increased force,” the bulletin stated. “They also need to recognize that individuals with autism often confess to crimes that they did not commit or may respond to the last choice in a sequence presented in a question.”
But a review of multiple studies last year by Chapman University researchers found that while up to 60% of officers have been on a call involving an autistic person, only 5% to 40% had received any training on autism.
In response, universities, nonprofits and private consultants across the U.S. have developed curricula for law enforcement on how to recognize autistic behaviors and adapt accordingly.
The primary goal, Movius told deputies at November’s training session, is to slow interactions down to the greatest extent possible. Many autistic people require additional time to process auditory input and verbal responses, particularly in unfamiliar circumstances.
If at all possible, Movius said, wait 20 seconds for a response after asking a question. It may feel unnaturally long, she acknowledged. But every additional question or instruction fired in that time — what’s your name? Did you hear me? Look at me. What’s your name? — just decreases the likelihood that a person struggling to process will be able to respond at all.
Moss’ son, Brayden, then 17, was one of several teenagers and young adults with autism who spoke or wrote statements to be read to the deputies. The diversity of their speech patterns and physical mannerisms showed the breadth of the spectrum. Some were fluently verbal, while others communicated through signs and notes.
“This population is so diverse. It is so complicated. But if there’s anything that we can show [deputies] in here that will make them stop and think, ‘Hey, what if this is autism?’ … it is saving lives,” Moss said.
Mayor Cory Moss, left, and Kate Movius hug at the end of the training program last November. Movius started Autism Interaction Solutions after her son was born with profound autism.
(Genaro Molina / Los Angeles Times)
Some disability advocates cautioned that it takes more than isolated training sessions to ensure encounters end safely.
Judy Mark, co-founder and president of the nonprofit Disability Voices United, says she trained thousands of officers on safe autism interactions but stopped after Cervantes’ shooting. She now urges families concerned about an autistic child’s safety to call an ambulance rather than law enforcement.
“I have significant concern about these training sessions,” Mark said. “People get comfort from it, and the Sheriff’s Department can check the box.”
While not a panacea, supporters argue that a brief course is better than no preparation at all. Some years ago, Movius received a letter from a man whose profoundly autistic son slipped away as the family loaded their car at the beach. He opened the unlocked door of a police vehicle, climbed into the back and began to flail in distress.
Though surprised, the officer seated at the wheel de-escalated the situation and helped the young man find his family, the father wrote to Movius. He had just been to her training.
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