Steve Blank

In 2023 China flying a “spy balloon” over the U.S. created an international incident.

It turns out the U.S. did the same to the Soviet Union in the 1950’s.

In the 1950’s the U.S. Military and the CIA enlisted balloons (some as tall as a 40-story building) as weapons systems targeting the Soviet Union. Throughout the decade they launched a series of Top Secret/codeword balloon projects and thousands of balloons, to gather intelligence about the Soviet Union. The individual stories of these programs are interesting but an unexpected consequence of their secrecy was that they created a mythology that outlasted the missions.

Why Balloons?
In the 1950’s balloons had attributes that airplanes couldn’t match. In the days before satellites they could stay aloft for a long time (days or even weeks,) they could reach altitudes where airplanes couldn’t fly (100,000 feet,) and they could go places that were too dangerous for manned aircraft (flying over the Soviet Union.)

The Search for Soviet Nuclear Weapons
Project MOGUL was an Air Force balloon program to detect Soviet nuclear tests by listening to sound waves traveling through the upper atmosphere. During World War II, scientists had discovered the existence of an ocean layer that conducted underwater sound for thousands of miles. They thought that a similar sound channel might exist in the upper atmosphere. If they could put microphones in the upper atmosphere, the U.S. thought they might be able to hear Soviet nuclear tests and even detect ballistic missiles launches heading toward their targets. Designed to test this theory, Project Mogul balloons carried microphones up to the sound channel to “listen” and radio transmitters to send the sound to the ground. At first, project MOGUL flights involved trains of small weather balloons up to 600 feet in length. Later MOGUL flights used the large polyethylene balloons developed for the Navy’s SKYHOOK.

Flying Sandwich Bags – SKYHOOK
SKYHOOK balloons, funded by the Office of Naval Research, were designed to stay at a fixed altitude (~100,000 feet) and carry a payload of thousands of pounds. They were huge, 400 feet high, made possible because the then new material called polyethylene. These “flying sandwich bags” were built by a company that had experience using this material in packaging – General Mills the same company that makes Cheerios. (Like many American companies in the Cold War they worked on other defense problems.)

Sniffing for a Reactor – Nuclear Air Sampling – ASHCAN
In 1957 the Air Force started Project ASHCAN (using SKYHOOK class balloons at 100,0000 feet) to take high altitude air samples and search for nuclear particles and trace gases in fallout from tests in the Soviet Union. For the first time, U.S. intelligence could estimate the amount of plutonium being produced by Soviet weapons production reactors. These balloons were secretly launched from Brazil and the Panama Canal Zone, and from air force bases in the U.S.  Over time, U.S. intelligence also used reconnaissance planes like the U-2, RB-57’s, and C-130 aircraft to collect air samples.

Genetrix Launched from the U.S.S. Valley Forge

Ballooning Over the Soviet Union – GENETRIX
While the nuclear detection balloons did their spying while flying above the U.S. or allied countries, the next series of balloons flew over the Soviet Union.

In the 1950’s, while U.S. reconnaissance aircraft flew around the periphery of the Soviet Union, U.S. military planners still had virtually no information about what was going on in vast areas of the Soviet territory. While there were a few overflights of the Soviet interior in the early 1950’s these missions were extremely risky and couldn’t provide enough information to assess Soviet military strength. Spy satellites and the U-2 spy planes were still far in the future so the U.S. military became big fans of reconnaissance balloons as a solution to this problem.

In 1950 the Air Force thought that high-altitude balloons might be used to perform photo and ELINT spyflights over the Soviet Union.  They placed aerial reconnaissance cameras on the balloons and ran a series of test programs (code names of GOPHER, MOBY DICK, GRANDSON and GRAYBACK) launching 640 balloons from New Mexico, Montana, the West Coast, Missouri and Georgia. With the tests completed, the program name changed to GENETRIX and was given the designation of Weapons System 119L.

In late 1955 President Eisenhower gave the ok to launch the GENETRIX balloons over the Soviet Union. Hundreds of these balloons took off from secret sites in Norway, Scotland, West Germany, and Turkey carrying a gondola with two reconnaissance cameras.

The United States launched 516 of the GENETRIX balloons but only 44 or so made it out of the Soviet Union.  The rest landed on Soviet farms dumping 600-pound cameras in hayfields. We did get coverage of about 8 percent of the Soviet Union, but politically it created a lot of tension as cameras were popping up on Khrushchev’s desk. “Oh, another balloon Mr. Premier.”  The Soviets put on a public exhibition of the equipment.

Bigger and Better- MELTING POT
Never one to give up, the military suggested a bigger and better balloon program. Since the GENETRIX balloons flying at 55,000 feet were relatively easy for Soviet fighters to intercept, the new balloons would be built around the Navy SKYHOOK design and fly at 100,000 feet for up to a month. These balloons would carry a new reconnaissance camera, built by the Boston University Physical Research Lab. Three of these balloons were launched in July 1958 from an aircraft carrier off the east coast of Japan (in those months the jet stream at the altitude went west to east.) All three accidentally dropped their gondolas over Communist territory. President Eisenhower cancelled all the balloon overflights.

Unexpected Consequences – UFO’s in the 1950’s
All these balloon flights had an unexpected consequence on a jittery and paranoid nation in the Cold War. Before sunrise and after sunset, while the Earth below was dark, high altitude balloons were still lit by sunlight, and their plastic skin glowed and appeared to change color with the change in sun angle. Some of the Project Mogul balloon flights were launched from Alamogordo Air Base in New Mexico in 1947, and a few crashed nearby – one near a town called Roswell. The military cover-up of the secret purpose of the balloon led to conspiracy theories about aliens and UFOs. The start of the Mogul balloon flights coincided with the first reports of UFO’s. To someone on the ground, these balloons may have looked like UFOs.

Because each of these separate balloon programs were highly compartmentalized programs it’s doubtful that there was any one individual who realized that the sum of the programs were putting thousands of high altitude balloons in the air in the 1950’s. The MOGUL, MOBY DICK, ASHCAN and GENETRIX programs were the CIA/military’s most closely guarded secret projects. Balloon sightings were dismissed with cover story: they were just weather balloons. Even as one part of the military tried to investigate these sightings, the other kept them away from the true purpose of the balloon missions.The reason for the denials – 1) the Soviets could have masked their nuclear tests and filtered their reactor emissions if they knew what we were sampling and 2) GENETRIX balloon flights over the Soviet Union were a violation of international law.

The thousands of classified and compartmentalized balloon flights (along with the first flight of the high altitude CIA U-2 reconnaissance plane in 1955) are a possible explanation of of UFO sightings in the 1950’s and the claim of military cover-ups.

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This post is the latest in the “Secret History Series.”  They’ll make much more sense if you read some of the earlier ones for context. See the Secret History video and slides as well as the bibliography for sources and supplemental reading.

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The Soviet Union’s detonation of an atomic weapon in 1949 and the start of the Korean War in 1950 fed cold war paranoia in the military and political leadership of the United States. The U.S. intelligence community was determined to find out what was going on inside the Soviet Union. But Soviet secrecy had the country locked down tightly. Desperate for intelligence, the CIA would fly the Lockheed built U-2 spy plane into and over the Soviet Union on 24 missions from 1956-1960 taking photos of its military installations.

But even as the U-2 was beginning its overflights, the U.S. military had concluded that the future of intelligence over the Soviet Union would no longer be with airplanes, but would rely instead on spy satellites orbiting hundreds of miles above in space.

One company in what is today Silicon Valley would build most of them.

Weapons System 117L
In 1956 Lockheed Missiles had just won the contract to build the Polaris Submarine Launched Ballistic Missile (SLBM) for the U.S. Navy in Sunnyvale California, and down in Los Angeles, the U.S. Air Force was on a “crash program” to build land-based Intercontinental Ballistic Missiles (ICBM’s) – the Atlas, Titan and Minuteman.

In 1954, three years before the U.S. or the Soviet Union ever orbited a single satellite, the Air Force asked the RAND corporation to study what satellites could do for the military. Their answer: satellites would enable us to peer over the closed border and inside the Soviet Union. In 1956, the Air Force organization building our ICBMs was assigned to build a family of satellites to spy on the Soviet Union from space. These satellites would be configured to carry out different reconnaissance missions, including photo reconnaissance, infrared missile warning, and Electronic Intelligence.

This military spy satellite program was called Weapons System 117L.

Spies in Sunnyvale
In 1956 the Air Force gave Lockheed Missiles Division in Sunnyvale the contract to build Weapons System 117L.

Over the next two years Weapons System 117L evolved into a large ambitious program with multiple satellites:

• The Satellite and Missile Observation System (SAMOS) would take low resolution pictures of the Soviet Union from space and transmit the photos electronically to earth.
• Another SAMOS version (called Ferrets) would collect electronic intelligence on Soviet radars and transmit the location and radar details electronically to earth.
• The Missile Detection Alarm System (MIDAS) would provide early warning of the launch of Soviet missiles heading to the U.S. by looking for the hot exhaust (the infrared plume) of rocket engines and transmit the location of the launch electronically to earth.

Crisis
In 1957, a year after Lockheed got the contract to start building WS-117L, the Soviet Union tested an ICBM – one that could carry a nuclear warhead to the United States. They quickly followed with the launch of Sputnik, the first earth-orbiting satellite.

These two events jolted the U.S. intelligence agencies into crisis mode. The Soviet Union claimed they could turn out ICBMs like sausages, and the CIA desperately needed to know how many missiles the Soviets really had and where they were.

Not Good Enough
The photo reconnaissance satellite designed for Weapons System-117 would have let the U.S. military see objects larger than 100-feet from space.  This 100-foot resolution was sufficient for its original mission – to assess how effective the first wave of nuclear attacks on the Soviet Union had been. This “post-strike bomb damage assessment” would allow targets that had been missed by the nuclear armed SAC bombers to be retargeted for follow-on attacks. Because of the immediacy of the information, it required real-time electronic read-out of film developed on orbit.

The problem was that while 100-foot resolution was good enough to locate craters left in cities from space, it wasn’t sufficient for the new mission; to locate the new Soviet ICBM silos and bombers. In addition, the electronic read-out of film developed on orbit was nowhere near ready; it was too complex for its time and technology.

The CIA and Corona
The CIA convinced the Secretary of Defense that the best bet was to build a separate photo reconnaissance satellite carrying a camera that took pictures from space as it passed over the Soviet Union. Film from the camera would be de-orbited in a capsule that could survive the heat of re-entry from space. A parachute would slow the descent of the capsule, which would be snatched in mid-air over the Pacific Ocean by a recovery plane hooking its parachute.  The idea was that this film-based spy satellite would be a short-term project until the Lockheed electronic readout version was in better shape.

This Project was code-named Corona.

The Flamingo Motel
In March 1958 a few unassuming guests checked into the Flamingo Motel in San Mateo, California, near the San Francisco airport. The CIA, and their primary contractors Lockheed, Kodak, Fairchild and GE, met to hash out their roles and the schedule. The CIA was the customer. Lockheed would integrate and assemble the satellites, Itek (which replaced Fairchild) would provide the camera, Kodak the film, and GE would provide the recovery system that would bring the exposed film through the fiery re-entry back to earth.

After the meeting, the Lockheed manager for Corona rented his own hotel room in Rickey’s Hyatt House in Palo Alto to start to plan the program. He needed to find a factory, separate from the already secret Polaris factory in Sunnyvale. He found an unused facility at the Hiller Helicopter factory on Willow Road in East Palo Alto which became the Lockheed “Advanced Projects” facility.

Deception
To hide the fact that we were launching high-resolution photo reconnaissance satellites over the Soviet Union, the CIA had the Air Force publically cancelled the SAMOS photo reconnaissance portion of WS-117L. The program then was resurrected as a “deep black” “compartmentalized” CIA program. When the Corona satellites were launched the CIA used a “cover” story. They called the Corona satellites the  “Discoverer” program and claimed it was an experimental program to develop and test satellite subsystems and explore environmental conditions in space. The film recovery capsule was described as a “biomedical capsule” for the recovery of biological specimens sent into space as an early test of how humans would react to manned spaceflight.

East Palo Alto – Lockheed’s Satellite Factory
The Corona project was run like a startup – a small team, minimum bureaucracy, focussed on a goal and tightly integrated with customer needs. Starting in February 1959, only 12 months after the program began the Air Force launched the first  Corona reconnaissance satellite from the military’s secret spaceport on the California coast at Vandenberg Air Force Base. But the first 13 missions were failures. Yet the program was deemed so important to national security the CIA and the Air Force persevered. And when the first images were received they transformed technical intelligence forever. At first, objects as small as 20-35 feet could be seen from space, with later versions improving to be able to see 6 foot objects, over millions of miles of a formally closed country.

Corona Image of Stepnogorsk Bioweapons Facility

Over the life of the program there were 145 Corona launches – 120 were complete or partial successes. During that same decade the Corona program evolved into six different satellite models (the KH-1 thru KH-6) with three different intelligence objectives.

Lockheed turned the Hiller Helicopter plant in East Palo Alto into the control facility for all spy satellites and the Corona spy satellite assembly line – building about one a month and delivering ~145 Corona satellites over the life of the program.

Stanford, Jasons, WS-117L and Corona
In addition to Lockheed, Stanford University also had a hand in Corona. Sidney Drell, then a professor in the Stanford Physics department, was one of the dozen of young scientists who were founding members of the Jason Group (scientists working on national security problems.) His first project was understanding whether a Soviet nuclear burst in space could blind the infrared sensors on the Midas portion of WS-117L.  This research got him invited to be part of the President’s Scientific Advisory Council (PSAC). But it was when the CIA asked him to solve some technical problems with the film on the Corona spacecraft that his career became intertwined with photo reconnaissance. His studies convinced the CIA that photo interpreters needed an order of magnitude improvement in resolution, and Corona had been pushed to its limits. In the late 1960’s Drell, as a member of the Land Panel convinced the CIA that the next generation of photo reconnaissance satellites should transmit their images back to earth in real-time, and use CCD’s rather than film.

For his work, Drell, still at Stanford, was recognized as one of the ten founders of National Reconnaissance by the NRO.

Corona Firsts
While Corona had a number of technological breakthroughs, including the first photoreconnaissance satellite, the first recovery of an object from space, etc. it was Corona imagery in 1961 that told the intelligence community and the new Kennedy administration that the “missile gap” (the supposed Soviet lead in ICBMs) was illusory. By fall of 1961 Soviet Union had a total of six deployed ICBMs – we had ten times as many. In truth, it was the U.S. that had the lead in missiles.

Corona was just the beginning. Overhead reconnaissance would become an integral part of the U.S. intelligence community. Hidden in plain sight, Lockheed and the U.S. intelligence community were just getting started in Silicon Valley.

Next – Agena, Midas, Ferrets and the NRO in Part XV of the Secret History of Silicon Valley.

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This post is the latest in the “Secret History Series.”  They’ll make much more sense if you read some of the earlier ones for context. See the Secret History bibliography for sources and supplemental reading.

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The Future is Clear – Microwave Valley Forever
In 1956 Hewlett Packard, back then a maker of test equipment was the valley’s largest electronics employer with 900 employees. But startups were rapidly spinning out of Stanford’s Applied Electronics Lab delivering microwave tubes, components and complete electronic intelligence and electronic warfare systems for the U.S. military and intelligence agencies. The future of the valley was clear – microwaves.

1956 – Change Everything
In 1956 two events would change everything.  At the time neither appeared earthshaking or momentous. Shockley Semiconductor Laboratory, the first semiconductor company in the valley, set up shop in Mountain View. And down the street, Lockheed Missiles Systems Division which would become the valley’s most important startup for the next 20 years, moves its new missile division from Burbank to 275 acres next to the Moffett Naval Air Station in Sunnyvale. (Lockheed’s 8 million-square-foot Sunnyvale complex, was the largest corporate real estate complex in Silicon Valley until the 1990s.)

Lockheed – Building Nuclear Missiles in Sunnyvale
Lockheed, an airplane manufacturer, was getting into the missile business by becoming the prime contractor to build the Polaris, a submarine launched ballistic missile (SLBM) developed by the Navy. The Polaris was unique: it would be the first solid-fuel ballistic missile used by the U.S.  Solid fuel solved the safety problem of carrying missiles at sea and underwater and also allowed for instant launch capability. Polaris launched SLBM’s would become the third part of the nuclear triad the U.S. built in the cold war –  the Polaris, the B-52 manned bomber, and the Minuteman, and Titan land-based Intercontinental Ballistic Missiles (ICBMs.)

Each Polaris missile carried a 600 kT nuclear warhead, (later Polaris versions carried three) and each ballistic missile submarine carried 16 of these missiles. 10 years after the program started the United States had built and put to sea 41 ballistic missile submarines carrying 656 Lockheed missiles (28.5 ft high, and weighing 29,000 lbs.) The company acquired a 5,000 acre missile test facility near Santa Cruz, and for years would test it’s missiles in the mountains above the valley.

Between 1960 and 1971, Lockheed built three versions of the Polaris missile: with each successive version increasing its range and accuracy.

One can assume that with spares, Lockheed built close to 750 of Polaris missiles in those ten years. That’s ~75 missiles a year, 6/month flying out of Moffett Field.

In 1971, Lockheed built a longer range version of the Polaris—called the Poseidon by enlarging it to the maximum size to fit into the existing submarine launch tubes. In 1990, Lockheed delivered Trident – the current generation of submarine launched ballistic missiles.

You Can Be Sure if It’s Westinghouse
Polaris submarines carried each missile in a separate launch tube. Down the street from Lockheed in Sunnyvale, another American corporate icon, Westinghouse became the developer of the launch tube for the Polaris missile. To launch missiles from a submarine under water, Westinghouse had to solve several problems. The launch tube had to keep the missile snug in its tube until firing. It had to eject the missile with sufficient velocity so it would head to the surface from a 100’ feet under water, and it had to protect the submarine when ocean water came rushing in to the now empty launch tube.  Oil-filled shock absorbers solved the cushioning problem and compressed air launched the missile out of the tube through a thin diaphragm that separated the missile from the ocean once the missile launch covers were opened.

Zero to 28,000 people – We Become “Defense Valley”
By 1965 Hewlett Packard, the test and instrumentation company, had grown ten-fold.  From 900 people in 1956 it now employed 9,000. Clearly it must have been the dominant company in the valley? Or perhaps it was Fairchild, the direct descendant of Shockley Semiconductor, now the dominant semiconductor supplier in the valley (80% of its first years business coming from military systems) with ~10,000 people?

Nope, it was the Lockheed Missiles Division, which had zero employees in 1956, now in 1965 had 28,000 employees in Sunnyvale. The best and the brightest were coming from across the country to the valley south of San Francisco.

And they were not only building Polaris missiles.

By 1965 Lockheed factories in Sunnyvale, Stanford and East Palo Alto were building the most secret spy satellites and rockets you never heard of. While the 1950’s had made us “Microwave Valley,” the growth of Lockheed, Westinghouse and their suppliers had turned us into “Defense Valley.”

In the next post; Spy Satellites in East Palo Alto and Stanford – Corona, WS-117, Samos, Ferret’s and Agena in Part XIV of the Secret History of Silicon Valley.

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