On 3 July 1955, Western military attachés stood at the Soviet Aviation Day display at Tushino, near Moscow, and watched something that frightened them: wave after wave of big four-jet bombers thundering overhead. They counted, and re-counted, and went home convinced the Soviet Union was mass-producing a fleet of aircraft capable of nuking the United States.

They had been played. Many of those bombers were the same handful of aircraft, flying out of sight, looping around, and coming back for another pass. It was one of the great bluffs of the Cold War — and it worked spectacularly.

A bomber built to reach America

The aircraft was the Myasishchev M-4, NATO codename “Bison,” the Soviet Union’s first four-jet strategic bomber. It first flew in 1953, and on paper it was exactly what Moscow wanted: a jet big enough to carry a nuclear bomb from Soviet soil to targets in the United States.

On paper. In reality the Bison had a fatal flaw — range. It simply could not fly to the American heartland and back. It could threaten some targets on a one-way trip, but as a credible intercontinental deterrent against a country building fleets of B-52s, it fell short. The Soviets knew it. The trick was making sure the Americans did not.

The flypast that fooled the West

The Tushino show is the stuff of intelligence legend. By the most-repeated account, ten Bisons flew past the reviewing stand, disappeared over the horizon, joined up with eight more, and came back for a second pass — leaving observers to tally 28 aircraft where far fewer existed. From that snapshot, US analysts extrapolated wildly: the CIA estimated the Soviets would field 800 Bisons by 1960.

Historians still argue over whether this was a deliberate deception or simply Western observers fooling themselves. But the effect on Washington was not in doubt.

The gap that never was

The panic had a name: the “bomber gap.” In 1956, Senator Stuart Symington — a former Air Force secretary — ran hearings warning that the Soviets were pulling ahead, and Congress poured hundreds of millions of extra dollars into Strategic Air Command. The United States built thousands of B-47s and B-52s and hundreds of KC-135 tankers, partly to close a gap that did not exist.

President Eisenhower was sceptical from the start. Doubting the alarmist estimates, he authorised the aircraft that would settle the question: the U-2 spy plane. When it began overflying the Soviet Union in 1956, the truth came quickly. There was no fleet. Only about 93 Bisons were ever built.

The afterlife of a bluff

The Bison never became the weapon Moscow advertised. Most were converted into aerial tankers, and one was rebuilt into the extraordinary VM-T Atlant, a bulbous transport that ferried components of the Buran space shuttle on its back. The bomber that pretended to be a fleet ended its days hauling cargo.

The deeper irony is that the bluff may have backfired. By frightening Washington into a vast, real bomber and missile build-up, the phantom fleet at Tushino helped trigger exactly the arms race it was meant to deter. Sometimes the most expensive weapon on the field is the one that was never really there.

Sources: Wikipedia; The Aviation Geek Club; RUSI, “Overestimating Soviet Airpower”; U.S. State of the Union (1961); GlobalSecurity.org.