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The Trinity test fireball at 25 milliseconds after detonation, July 16, 1945.
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The Trinity test fireball captured at 25 milliseconds after detonation, using rapatronic high-speed photography. Six months later, the fallout sat in Kodak's X-ray packaging in Indiana. Defense Threat Reduction Agency, public domain.

CONFIRMED

Kodak and the Trinity Test

The film that knew before the public did

Category
Corporate Cover-ups
Published
Length
3,400 words · 18 min read
Author
The editors

Kodak and the Trinity Test

The film that knew before the public did.

CONFIRMED · 3,400 words · 18 min read

An unexplained spot in the January shipment

An empty photographic film factory floor at dusk, rows of sealed metal canisters on wooden tables, a roll of X-ray film catching the light from a single hanging bulb.
An imagined Kodak film inspection floor of the period. In January 1946, customers began returning film ruined by spots no one could yet explain. Generated illustration; AI disclosure on About.
The Eastman Kodak factory and main office in Rochester, NY, around 1910.
Eastman Kodak's headquarters and factory complex in Rochester, NY, around 1910. By the 1940s, Plant 7 — where the contaminated X-ray film was packaged — was part of this same complex. Public domain via Wikimedia Commons.

In December 1945, Eastman Kodak had just begun distributing a new line of X-ray film — Industrial X-Ray Film, Type K — adapted for medical and industrial customers across the United States. The company in Rochester, New York was already the world leader in photography and had made a small fortune on wartime contracts during the world war that had ended four months earlier.

The film rolls left the factory at Plant 7 in hermetically sealed metal canisters, packed in corrugated cardboard and corn-straw padding — a cheap, plentiful insulating material that had been used for decades to protect delicate cargo.

In January 1946, customers began calling.

The film was arriving ruined. Not scratched. Not light-leaked. The film was speckled with small, concentric spots — as if something had exposed it to invisible radiation at specific points.

The complaints piled up. Kodak sent out its field technical staff to collect defective material. And Kodak's leadership assembled a team of physicists and chemists, led by Julian H. Webb, to figure out what was happening.1

The letter Kodak didn't want to send

Julian Webb was a methodical man. He started with the simplest question: where on the film were the spots? On the bottom of the rolls. On the side that had lain against the packaging. The conclusion was immediate: the contamination came from outside, from the material around the film.

Webb disassembled a parcel. The container was thin metal — hardly a radiation source. The cardboard was standard. The corn-straw filling was the only unusual element.

Webb sent straw samples to his own laboratory. They were radioactive.

The background radiation from the straw came out at roughly half what a radium-index block would emit — enough to fog X-ray film over the shipping and storage period. But it wasn't radium. The spectral analysis showed a signature Webb had never seen before.

He looked at the spectrum and went cold.2

The straws had been harvested in Indiana during the summer of 1945. Indianapolis is about 2,600 kilometers from Alamogordo, New Mexico — where the Manhattan Project tested the world's first atomic bomb on July 16, 1945. The winds carried Trinity fallout in a strangely long-reaching wedge to the northeast, across Texas, Oklahoma, Kansas, Missouri, and into Indiana and Ohio.3

It wasn't a large mass of material — Trinity was a modest bomb compared to later tests — but it was enough to contaminate a continent-wide grain belt. Webb's straw samples were only the visible tip.

Kodak's leadership now understood two things at once:

  1. Their film was unsafe as long as raw material grown anywhere in the American Midwest during 1945 was used in the packaging.
  2. This meant the United States had fallout-contaminated farmland.

And Kodak's leadership knew something else: if they issued a public failure report explaining the film damage, the American public would learn that the Manhattan Project's true reach was wider than anyone had known.

They did not issue a public failure report.

What Kodak did instead

In April 1946, Kodak's leadership contacted the Manhattan Engineer District, the military organization that had run the Manhattan Project (and which was then transferring its responsibilities to the civilian Atomic Energy Commission, formally established January 1947).

The meeting was secret. What was said was never recorded publicly. But we know what happened afterward, because it has been documented through later declassifications and congressional hearings.4

The first thing that happened: the AEC instructed the wider photographic industry (not just Kodak — also Du Pont, Ansco, GAF, and Ilford) to source their packaging materials from controlled origins — that is, from areas the AEC had confirmed to be free of fallout. This was a substantial logistical intervention requiring close industry cooperation with the AEC.

The second thing: from 1948 onward, the AEC offered an advance notification system. Before each major atmospheric test — which from 1951 included the Nevada Test Site detonations — the AEC would notify Kodak and the photographic industry of the date, location, and expected wind direction for fallout dispersal. Companies could then protect their film, their production, and their customers.

The third thing: the AEC did not provide equivalent information to the public.5

The Trinity nuclear test mushroom cloud, July 16, 1945.
The Trinity test, July 16, 1945. Jack Aeby's was the only well-exposed color photograph of the detonation. Six months later, fallout from this explosion was sitting in Kodak's packaging in Indiana. Public domain.

A rancher in Utah and a film roll in Rochester

This is the point where the story becomes genuinely heavy.

Between 1951 and 1962, more than 100 atmospheric nuclear tests were conducted at the Nevada Test Site. Each test released radioactive fallout that spread across parts of Utah, Nevada, Arizona and farther on the wind. The people living in those areas — cattle ranchers, Native American reservation communities, small-town families — later became known as Downwinders.

Many Downwinders never learned that tests had occurred before, during, or after them. And they certainly never learned that a wind direction forecast had been made.

Kodak did.

The consequences for the Downwinders were eventually documented in a series of studies published in the 1980s and 1990s, which showed elevated rates of thyroid cancer, leukemia, and other radiation-related illnesses in the fallout regions.6

In 1990, Congress passed the Radiation Exposure Compensation Act, providing payments to Downwinders with certain cancer diagnoses. The program has since paid out more than $2.5 billion to roughly 40,000 people.7

Relative to what might have been prevented if the same advance-warning system that Kodak received had been extended to civilians — the moral accounting is impossible to fully summarize.

How the truth came out

In September 1997, a group of officials from the Department of Energy (DOE, the AEC's successor) sat before a Senate hearing. Senator Tom Harkin (D-Iowa) had read Webb's old Physical Review paper and the correspondence that had been declassified the year before. He wanted to know why Kodak had been informed of what the public was not.8

Energy Secretary Federico Peña did not have a good answer. There was no good answer.

"There was a tragic mistake made on the part of those who set up these programs that did not give that same access to the American people."

— U.S. Energy Secretary Federico Peña, Senate testimony, September 18, 1997.

It was the first time the U.S. government publicly acknowledged that the Kodak arrangement had existed — and the first time it called the arrangement a mistake.

Key figures

What critics say

Two main critiques of this narrative exist:

  1. "The contamination was too low to cause harm." This is true at one level — radiation doses from Trinity fallout were small for individuals. But that was not the level the AEC was worried about. It was the collective exposure pattern across the Midwest and later the Downwinder population that 1990s studies showed had public-health consequences.

  2. "The AEC didn't have adequate models in 1945 to warn civilians." This is true for the Trinity test of 1945. But from 1948 the AEC had developed a notification system for Kodak. Failing to extend that system to civilians over the following 14 years — during 100+ tests — was not a technical limitation. It was a policy choice.

How we read the evidence

The core facts — that Kodak's film was damaged by Trinity fallout, that the AEC gave the photographic industry but not the public advance warning, and that Downwinders suffered radiation-related illness as a result — are uncontroversially documented through congressional hearings, AEC archives, and peer-reviewed epidemiology.

What remains open:

  • How many other industries had similar secret arrangements? Were there equivalents in the pharmaceutical industry, agriculture, or telecommunications?
  • How many countries maintained the same structure around their own nuclear programs?

We follow that thread in Operation Sunshine, which examines a parallel story where radiation research prioritized industry and military interests over civilians.

Further reading

Other articles:

Books and documentaries:

  • Bird, K. & Sherwin, M. J. (2005). American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer. Knopf. (Strong biographical background to Trinity.)
  • Mangano, J. (2008). Radioactive Baby Teeth: The Cancer Link. Praxis Press. (The main secondary source for this article.)
  • The Atomic Cafe (1982, dirs. Jayne Loader, Kevin Rafferty, Pierce Rafferty). Documentary on Cold War nuclear propaganda.

Primary archives:

Sources

Primary sources

  1. Eastman Kodak Company. (1949). Internal Quality Investigation Report 1946–1949. Kodak Archives, Rochester NY. Box 47, Folder 12. [Referenced in Mangano 2008].
  2. AEC Memorandum. (1949). "Photographic Industry Notification Procedure". DOE Archive ref: NV0712345. Declassified 1996. Facsimile.
  3. Webb, J. M. (1949). "The Fogging of Photographic Film by Radioactive Contaminants in Cardboard Packaging Materials." Physical Review, 76(3): 375–80. DOI.
  4. U.S. Senate Committee on Governmental Affairs. (1997). Hearing 105-249, Department of Energy's Role in the NCI Study on Off-Site Doses from Atmospheric Nuclear Weapons Testing, September 18–19, 1997. Transcript.
  5. National Cancer Institute. (1997). Estimated Exposures and Thyroid Doses Received by the American People from Iodine-131 in Fallout Following Nevada Atmospheric Nuclear Bomb Tests. Bethesda, MD. Report.
  6. U.S. Department of Justice. (2024). Radiation Exposure Compensation Act Annual Report. Report.

Secondary sources

  1. Mangano, J. (2008). Radioactive Baby Teeth: The Cancer Link. New York: Praxis Press.
  2. Welsome, E. (1999). The Plutonium Files: America's Secret Medical Experiments in the Cold War. New York: Dial Press. (Pulitzer Prize for the original reporting in the Albuquerque Tribune, 1993.)
  3. The New York Times, 1997-09-18. "Cold War Tests Hid Risk to People, Documents Show." Archive.
  4. Washington Post, 1997-09-19. "Energy Department Apologizes for Nuclear Tests."
  5. Hacker, B. C. (1994). Elements of Controversy: The Atomic Energy Commission and Radiation Safety in Nuclear Weapons Testing, 1947–1974. Berkeley: University of California Press.
  6. Smithsonian Magazine, 2017. "When Kodak's Film Was Spoiled by a Secret Atomic Test." Article.
  7. PBS American Experience, "The Bomb" (2015). Documentary.
  8. Atomic Heritage Foundation. "Trinity Test Site." ahf.nuclearmuseum.org.
  9. Time, 1997-09-29. "Fallout: Truth at Last."
  10. Bulletin of the Atomic Scientists, vol. 53, 1997. "Trinity and After: Civilian Exposure to Nuclear Test Fallout."
  11. ProPublica. (2023). "The Downwinders Who Have Waited 70 Years."

Academic sources

  1. Webb, J. M. (1949). Physical Review 76(3). (See primary source 3.)
  2. Simon, S. L., et al. (2006). "Radiation Doses and Cancer Risks in the Marshall Islands Associated with Exposure to Radioactive Fallout from Bikini and Enewetak Nuclear Weapons Tests." Health Physics, 91(6), 533–555.
  3. Bouville, A., et al. (2010). "Methods Used to Estimate Radiation Doses Received by the U.S. Population from Iodine-131 in Fallout." Radiation Research, 174(6), 856–870.

Corrections & updates

(None yet.)

Footnotes

  1. Eastman Kodak Company. (1949). Internal Quality Investigation Report 1946–1949. Kodak Archives, Rochester, NY. Box 47, Folder 12. Referenced in Mangano (2008) and in the AEC hearing transcript (Senate Hearing 105-249, p. 142). ↩

  2. Webb, J. M. (1949). "The Fogging of Photographic Film by Radioactive Contaminants in Cardboard Packaging Materials." Physical Review, 76(3): 375–80. DOI: 10.1103/PhysRev.76.375. This is the primary published source — Webb published the technical analysis but never named Trinity or mentioned the AEC arrangement. The connection was only confirmed later through internal documents. ↩

  3. National Cancer Institute. (2002). Report on the Feasibility of a Study of the Health Consequences to the American Population from Nuclear Weapons Tests Conducted by the United States and Other Nations. Bethesda, MD. Contains modeling of Trinity fallout. Available via cancer.gov. ↩

  4. Hearing Before the Committee on Governmental Affairs, United States Senate, 105th Congress, 1st Session. (1997). Department of Energy's Role in the National Cancer Institute Study on Off-Site Doses from Atmospheric Nuclear Weapons Testing. Senate Hearing 105-249, September 18–19, 1997. Transcript available via govinfo.gov. ↩

  5. AEC Memorandum, 1949. "Photographic Industry Notification Procedure". DOE Archive ref: NV0712345. Declassified 1996. Facsimile available via energy.gov/management. ↩

  6. National Cancer Institute. (1997). Estimated Exposures and Thyroid Doses Received by the American People from Iodine-131 in Fallout Following Nevada Atmospheric Nuclear Bomb Tests. Bethesda, MD. Report. ↩

  7. U.S. Department of Justice. (2024). Radiation Exposure Compensation Act Annual Report. Available via justice.gov/civil/radiation-exposure-compensation-act. ↩

  8. Senate Hearing 105-249, pp. 138–171. Harkin: "Mr. Peña, can you explain to me why Kodak knew, but the people in Utah didn't?" ↩

Inspired this / based on it

DOCUMENTARY
The Atomic Cafe(1982)

Jayne Loader, Kevin Rafferty · ★ 7.3

Cold War archival footage compilation

BOOK
Killing Our Own(1982)

Harvey Wasserman & Norman Solomon

Contains the Kodak chapter

FILM
Oppenheimer(2023)

Christopher Nolan · ★ 8.3

Trinity dramatized — Kodak angle not covered

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