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THE contents of a Chinese spy balloon that flew across the US before being shot down by American F-22s have reportedly been revealed.

The enormous craft - as big as three buses - had flown over areas that contained sensitive airbases and nuclear missiles in underground silos.

Close-up photo of a Chinese spy balloon taken from a U-2 surveillance plane.
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A U-2 surveillance photo showing the closest look yet at the Chinese spy balloon shot down off the US coastCredit: The Mega Agency
Parachute descending against a blue sky.
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The US shot down the Chinese spy balloon over the Atlantic Ocean using an F-22Credit: Reuters
Soldiers retrieving equipment from the ocean on a boat.
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Military officials recovered the remains of the balloon near the South Carolina coast after it was shot downCredit: AP

US officials said at the time that the balloon was "used by the PRC [People's Republic of China] in an attempt to surveil strategic sites in the continental United States".

"Clearly, the intent of this balloon is for surveillance," said a US official.

However, the spycraft was secretly packed with US technology that may have helped China spy on American grounds, two military sources with direct knowledge of the analysis told .

Officials found that the balloon was equipped with American-made satellite communication modules and sophisticated sensors from at least five different US companies, the outlet reports.

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The American technology allowed the spy balloon to take photographs and collect sensitive information, according to a classified report seen by the outlet.

The balloon is understood to have been operating above civilian air traffic and below "outer space."

It was first spotted over Billings, , in 2023 where residents on the ground reported it to local officials.

Montana is home to the Malmstrom Air Force Base, which houses one of the three nuclear missile fields in the U.S. It is home to 150 ICBM silos.

The spy balloon later drifted from  southeast to the Carolinas before being shot down in the Atlantic Ocean just off the coast of .

It had the ability to manoeuvre and was operating at an altitude of about 60,000 feet.

And after days of monitoring its movement, the surveillance balloon was taken out by a single AIM-9X air-to-air missile fired from an F-22 fighter jet over the Atlantic near South Carolina.

 expressed "strong dissatisfaction" against the object being shot down after claiming the balloon "used for meteorological purposes" accidentally entered American airspace due to strong winds.

A statement from the country’s foreign ministry added that  was ”overreacting” and “seriously violating international practice.”

Illustration of China spy balloon path over the US, showing its size and proximity to US nuclear bases.
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Satellite against a dark blue sky.
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Picture shows the giant Chinese spy balloon flying over the USCredit: AP:Associated Press
Pilot's view from cockpit of a satellite deployment.
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The Department of Defense released a photo from the cockpit of a U-2 spy plane flying above the Chinese spy balloonCredit: US Department of Defense

"China expresses its strong dissatisfaction and protest against the U.S.'s use of force to attack civilian unmanned aircraft," the statement read.

"The Chinese side has repeatedly informed the US side after verification that the airship is for civilian use and entered the US due to force majeure - it was completely an accident."

The advantages of balloons over satellites include the ability to scan wide swathes of territory from closer in, and to be able to spend more time over an area.

Such balloons typically operate at 80,000 and 120,000 feet - with airliners normally flying around 40,000 feet.

And unlike satellites, which require space launchers that cost hundreds of millions of dollars, balloons can be launched very cheaply.

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The balloons are not directly steered but can be roughly guided to a target area by changing altitudes to catch different wind currents.

The US military has tracked other spy balloons in recent years, according to a senior US defence official.

FBI agents processing evidence.
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The remnants of the balloon were taken to an FBI lab in VirginiaCredit: AP
Contrail against a blue sky.
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A commercial plane captured flying near the spy balloonCredit: EPA
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