In an era of orbital satellites so advanced that they are able to make out objects half the size of cars from space, a spy balloon might seem like a bit of a relic.
They were a prominent tool for reconnaissance during the Cold War and were even used in a more basic form for intelligence gathering in the Napoleonic Wars more than 200 years ago.
But security experts say the balloons are just the “tip of a revolution” in the development and use of new high-altitude surveillance craft, with the UK even investing millions in a project to develop spy balloons last year.
A senior defence official had previously said the US has “very high confidence” it was a Chinese high-altitude balloon and was flying over sensitive sites to collect information, while China has not immediately denied the balloon belonged to them.
The Pentagon acknowledged reports of a second balloon that was spotted flying over Latin America, saying: “We now assess it is another Chinese surveillance balloon”.
Image: A high-altitude balloon floats over Billings in Montana
The sightings prompted US Secretary of State Antony Blinken to postpone a high-profile visit to China which had been due to begin on Sunday, while the Pentagon accused Beijing of spying on sensitive military sites.
Beijing admitted that the initial balloon had come from China, but insisted it was a “civilian airship” that had strayed into American airspace and that it was for meteorological and other scientific research.
What are spy balloons?
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The devices are lightweight balloons, filled with gas, usually helium, and attached to a piece of spying equipment such as a long-range camera.
They can be launched from the ground and are sent up into the air where they can reach heights of between 60,000ft (18,000m) and 150,000ft (45,000m), above the flight paths of commercial aircraft in an area known as “near space”.
Once in the air, they travel using a mixture of air currents and pressurised air pockets, which can act as a form of steering.
Why are they still useful in the satellite era?
According to defence and security analyst Professor Michael Clarke, the biggest advantage of spy balloons over satellites are that they can study an area over a longer period of time.
Image: Professor Michael Clarke
“The advantage is they can stay in one place for a long time,” he told Sky News.
“Because of the way the Earth rotates, unless a satellite is over the Equator, you need three to five satellites going all the time to track the same spot.
“These balloons are also relatively cheap, and much easier to launch than a satellite.”
Will balloons continue to be used in future for spying?
Very much so, according to Professor Clarke.
Despite the wide use of satellite technology, countries including the UK are also focusing on the development and use of spycraft to operate in the upper atmosphere.
In August, it was announced the Ministry of Defence had agreed a £100m deal with US defence company Sierra Nevada to provide high-altitude unmanned balloons to be used for surveillance and reconnaissance.
Professor Clarke said: “(These balloons) are the very tip of the revolution for passive upper atmosphere aircraft.”
He said other defence firms, such as BAE, were working on ultralight solar-powered drones which are able to operate in the upper atmosphere and stay in place for up to 20 months.
Why have China used them now?
According to Professor Clarke, the use of these balloons, if indeed they were launched by China, will likely have been a message to the US following its decision to open new military bases in the Philippines.
“I think it’s a challenge,” he said.
“They (China) are signalling that if the US is going to come closer to them then they will be more aggressive with their surveillance.
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“It is also caused a political issue in the US now, because it will be seen as a sign of weakness not to shoot it down.
“This causes some embarrassment, but the US doesn’t need to respond.”
The balloon was spotted over Billings, Montana,on Wednesday – close to one of the US’s three nuclear missile silo fields at Malmstrom Air Force Base.
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Mao Ning, a Chinese foreign ministry spokesperson, says that those involved should be ‘cool-headed’
Military and defence leaders initially decided against shooting down the balloon due to the safety risk from falling debris.
Professor Clarke added: “I think the debris issue is a bit of an excuse. It was over one of the least densely populated areas of the US and if they needed to they could have asked everyone to stay inside.
“I don’t think they wanted to make it a bigger issue, because China are daring them to shoot it down and make it an international issue.”
A shirtless man waving a Mexican flag stands atop a burning car in the heart of Los Angeles, as another man throws a traffic cone into the flames and some play drums and shout chants in opposition to immigration officials.
In the background, city hall can be glimpsed through a haze of thick black smoke.
The downtown district of one of America’s biggest cities was a scene of pandemonium and lawlessness as protests, which had previously been mainly peaceful, turned ugly.
Critics of Donald Trump said the president’s extraordinary decision to deploy National Guard troops, defying the wishes of the state’s governor, had inflamed tensions and stoked emotions.
Image: A protester throws a cone into a burning fire in LA. Pic: Reuters/Daniel Cole
The 101 Freeway, the main highway cutting through the downtown area, was also closed down for much of the day as police and protesters faced off, with flash bang devices sending some people scattering.
Bottles and other projectiles were hurled towards police, who responded by using tear gas and rubber bullets.
It was this chaos, his critics say, that Donald Trump wanted to provoke.
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Image: California Highway Patrol officers try to dodge rocks being thrown. Pic: AP/Ethan Swope
Trump’s decision to call in 2,000 National Guard troops, several hundred of whom were on the streets of LA on Sunday, was taken without consultation with the California governor and LA mayor, and marked an extraordinary escalation by the president.
The military arrived on Sunday morning and was ordered to guard federal buildings, after two days of protest against Immigration and Customs Enforcement (ICE) officers.
As part of Trump’s closed border policy, ICE has been ordered to find, detain and deport as many illegal immigrants as possible, and it was these raids that stoked the first signs of protest on Friday into the weekend.
Image: Smoke rises as the National Guard clashed with protesters in downtown Los Angeles.
Pic: Reuters/Daniel Cole
By midday Sunday, the military was surrounded by protesters outside the Metropolitan Detention Centre in downtown LA. It was here that many immigrants had been held before being shipped off to detention facilities.
The walls and floors are covered in expletive-ridden graffiti, reading f*** ICE.
The Los Angeles police soon split the crowd and drove a wedge between the National Guard and the crowd.
California Governor Gavin Newsom has called Donald Trump’s acts those of a “dictator, not a president”.
Image: A police officer fires a soft round in Los Angeles. Pic: AP Photo/Eric Thayer
Image: Los Angeles Metro Police officers strike protesters during unrest in the downtown area of the city.
Pic: Reuters/Daniel Cole
He’s formally requested that the Trump administration withdraw the National Guard. The White House say the military will remain there until order is restored. Five hundred marines are still on standby.
Los Angeles Police Department police chief Jim McDonnell, asked whether the National Guard was needed, said: “This thing has gotten out of control.”
He said that although the LAPD would not initially have requested assistance from the National Guard, the disorder had caused him to reevaluate his assessment.
Image: US correspondent Martha Kelner is reporting from Los Angeles
Several people were arrested.
Sky News witnessed a young woman, who called herself Gabriella, riding her motorbike at speed towards a line of police officers.
The National Guard will be deployed to Los Angeles after “riots” in response to immigration raids extended into a second day.
California Governor Gavin Newsom confirmed that the Trump administration is deploying “2,000 soldiers” to Los Angeles after local police used tear gas, stun guns, and riot shields to push back immigration protesters on Saturday.
Demonstrations began outside the Los Angeles Federal Building in the downtown area of LA on Friday after officials from Immigration and Customs Enforcement (ICE) carried out raids in the area.
On Saturday, several dozen protesters were involved in police standoffs in Paramount, a city south of LA.
Mr Newsom warned in a post on X: “The federal government is sowing chaos so they can have an excuse to escalate. That is not the way any civilized country behaves.”
He described the deployment as “purposefully inflammatory” and claimed it will “only escalate tensions”.
President Donald Trump hit back at Mr Newsom in a post on his social media platform Truth Social on Saturday.
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“If Governor Gavin Newscum, of California, and Mayor Karen Bass, of Los Angeles, can’t do their jobs, which everyone knows they can’t, then the Federal Government will step in and solve the problem, RIOTS & LOOTERS, the way it should be solved!!!,” he wrote.
Mr Trump’s defence secretary Pete Hegseth claimed that active duty marines would also be mobilised if “violence continues”.
Image: A Los Angeles County Sheriff’s deputy holds back protesters in Paramount, Los Angeles on Saturday. Pic: Reuters
Image: Fireworks amid police standoffs with protesters in Paramount, Los Angeles on Saturday. Pic: Reuters
LA mayor Karen Bass said that amid the recovery from this year’s wildfires, “many in our community are feeling fear” following “recent federal immigration enforcement actions” across LA County.
“We’ve been in direct contact with officials in Washington, D.C., and are working closely with law enforcement to find the best path forward,” she said.
“Everyone has the right to peacefully protest, but let me be clear: violence and destruction are unacceptable, and those responsible will be held accountable.”
Reports the guard would be deployed to LA came earlier on Saturday, from Mr Trump’s border tsar Tom Homan on Fox News.
Image: Tear gas is fired at protesters in Paramount on Saturday. Pic: Reuters
Image: Fires amid immigration protests in Paramount, Los Angeles County on Saturday. Pic: AP
44 arrested in Friday raids
At least 44 people were arrested on suspicion of immigration violations during raids on Friday, with crowds of around “1,000 rioters” forming around the building before some “assaulted law enforcement officers, slashed tires, and defaced taxpayer-funded property”, according to the Department of Homeland Security.
The raids saw street vendors and day workers rounded up across Home Depots, a clothing factory, and a warehouse, Salas of Chirla (The Coalition for Humane Immigration Rights of Los Angeles) said.
In a statement on Saturday, White House press secretary Karoline Leavitt said “violent mobs” had “attacked ICE officers and federal law enforcement agents carrying out basic deportation operations”.
She described such activity as “essential to halting and reversing the invasion of illegal criminals into the United States”.
Ms Leavitt said Californian politicians were “feckless” and had “completely abdicated their responsibility to protect their citizens”, prompting Mr Trump’s order to send in the guard.
Image: Police fire stun grenades at protesters outside the Los Angeles Federal Building on Friday. Pic: Reuters
Image: A protester holds up a sign to police outside the Los Angeles Federal Building on Friday. Pic: Reuters
Protests spread to second city
On Saturday, protests spread to the Paramount area, where there is a significant Latino population, after demonstrators spotted ICE employees in a Home Depot car park they appeared to be using as a base.
Law enforcement officers faced off protesters at a road junction at around 5pm where a car had been set on fire earlier in the day.
The roads were pictured strewn with trolleys and rubbish bins set on fire, as gas canisters and fireworks were also set off.
Image: A car burns on Atlantic Boulevard in Paramount, Los Angeles on Saturday. Pic: Reuters
Image: The car burnt out in Paramount on Saturday. Pic: Reuters
Commenting on Saturday’s protests, the Los Angeles County Sheriff’s Office said: “It appeared that federal law enforcement officers were in the area, and that members of the public were gathering to protest.”
Vice President JD Vance claimed that “insurrectionists” were seen “carrying foreign flags” and “attacking immigration enforcement officers” in Paramount.
“One half of America’s political leadership has decided that border enforcement is evil,” he posted on X. “Time to pass President Trump’s beautiful bill and further secure the border.”
Image: Mexican and US flags are flown by protesters in Paramount. Pic: Reuters
Image: ‘Death to ICE’, Immigration and Customs Enforcement, is written on a bin in downtown Los Angeles on Friday. Pic: Reuters
The clashes come amid Trump’s nationwide crackdown on illegal migration.
As soon as he was re-elected in January he set a target of arresting 3,000 suspected illegal migrants per day – and promised to lock down the US-Mexico border.
Elon Musk’s social media post claiming Donald Trump is in files relating to the disgraced paedophile financier Jeffrey Epstein has been removed.
The tech billionaire made the allegation on X as he traded blows with the US president in a dramatic public row.
In the post, which now appears to have been deleted, Musk said: “@realDonaldTrump is in the Epstein files. That is the real reason they have not been made public.
“Mark this post for the future. The truth will come out.”
He gave no evidence for the claim, which was dismissed by the White House – with the post disappearing from his social media platform by Sunday.
Users clicking on the message – first posted on Thursday – were instead greeted with: “Hmm…this page doesn’t exist. Try searching for something else.”
Epstein killed himself in his jail cell in August 2019 while awaiting trial on charges of sex trafficking minors.
Image: File pic: Reuters
Musk and Mr Trump’s relationship broke down publicly on Thursday, just days after the Tesla and SpaceX chief executive left his role as a special government employee.
In a fiery exchange, Musk posted a series of messages on X criticising the president’s signature tax and spending bill as a “big ugly spending bill”.
President Trump posted on Truth Social, saying Musk had been “wearing thin” and claimed he “asked him to leave” his government position – something Musk denied.
Musk then hit back with his claim about the US president appearing in the Epstein files.
Press secretary Karoline Leavitt dismissed the comment in a statement.
“This is an unfortunate episode from Elon, who is unhappy with the One Big Beautiful Bill because it does not include the policies he wanted,” she said.
“The president is focused on passing this historic piece of legislation and making our country great again.”
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