What are spy balloons and why could they play a key role in the future of aerial reconnaissance?
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.
It comes as the US military on Friday said it was tracking a suspected Chinese spy balloon that has been flying over northwestern America in recent days.
A high-altitude balloon floats over Billings in Montana
Read more:
Chinese spy balloon flying over US airspace, says Pentagon
Spy balloon over US is actually a ‘civilian airship’, says China
A senior defence official said the US has “very high confidence” it is 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.
Beijing admitted that the 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?
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.
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 said they considered shooting the balloon out of the sky but decided against it 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.”
It’s 5.30am, but the car park outside a laundrette in south central Los Angeles is already bustling.
A woman is setting up a stand selling tacos on the pavement and the sun is beginning to rise behind the palm trees.
A group of seven women and two men are gathered in a circle, most wearing khaki green t-shirts.
The leader, a man named Francisco “Chavo” Romero, begins by asking how everyone is feeling. “Angry,” a few of them respond. “Proud of the community for pushing back,” says another.
Ron, a high school history teacher, issues a rallying cry. “This is like Vietnam,” he says. “We’re taking losses, but in the end we’re going to win. It’s a war.”
Francisco ‘Chavo’ Romero leads a volunteer group, attempting to warn people ahead of ICE raids
This is what the resistance against Donald Trump’s immigration policy looks like here. In the past month, immigration and customs enforcement agents – known as ICE – have intensified their raids on homes and workplaces across Los Angeles.
Since the beginning of June, nearly 2,800 undocumented immigrants have been arrested in the city, according to the Department of Homeland Security. The previous monthly high was just over 850 arrests in May this year.
Police use tear gas against protesters, angry at a recent immigration raid at a farm in Camarillo, California. Pic: AP
Videos have circulated online of people being tackled to the ground in the car park of DIY shops, in car washes and outside homes. The videos have prompted outrage, protests and a fightback.
“Chavo” and Ron belong to a group of organised volunteers called Union del Barrio. Every morning, a group of them meet, mostly in areas which have high immigrant populations.
The day I meet them, they’re in an area of LA which is heavily Latino. Armed with walkie talkies to communicate with each other, megaphones to warn the community and leaflets to raise awareness they set out in cars in different directions.
A volunteer from Union del Barrio shows Sky’s Martha Kelner how they try to stay one step ahead of ICE agents
They’re looking for cars used by ICE agents to monitor “targets”.
“That vehicle looks a little suspicious,” says Ron, pointing out a white SUV with blacked-out windows, “but there’s nobody in it”.
An elderly Latino man is standing on a street corner, cutting fruit to sell at his stall. “He’s the exact target that they’re looking for,” Ron says. “That’s what they’re doing now. The low-hanging fruit, the easy victim. And so that is proving to be more successful for their quotas.”
This man, selling fruit on a street corner in LA, is a potential target of immigration agents
In the end, it turns out to be a quiet morning in this part of LA, no brewing immigration operations. But elsewhere in the city, dawn raids are happening.
ICE agents are under pressure from the White House to boost their deportation numbers in line with Donald Trump’s campaign promise to crack down on illegal immigration.
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In June, tear gas and rubber bullets were fired at protestors demonstrating against immigration raids
Maria’s husband Javier was one of those arrested in LA. He came to the United States from Mexico when he was 19 and is now 58.
The couple have three grown-up children and two grandchildren. But Javier’s work permit expired two years ago, according to Maria and so he was living here illegally.
Maria’s husband Javier was arrested after his work permit expired
She shows me a video taken last month when Javier was at work at a car wash in Pomona, an area of LA. He is being handcuffed and arrested by armed and masked ICE agents, forced into a car. He is now being held at a detention centre two hours away.
“I know they’re doing their job,” she says, “but it’s like, ‘you don’t have to do it like that.’ Getting them and, you know, forcing people and pushing them down on the ground. They’re not animals.”
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US troops accused of ‘political stunt’ after park raid
Maria wipes away tears as she explains the impact of his absence for the past four weeks. “It’s been so hard without him,” she says. “You feel alone when you get used to somebody and he’s not there any more. We’ve never been apart for as long as this.”
The family have a lawyer and is appealing for him to remain in the US, but Maria fears he will be sent back to Mexico or even a third country.
Maria fears her husband, who has lived in the US for nearly 40 years, will be sent back to Mexico
“I don’t know what to say to my grandkids because the oldest one, who is five was very attached to his papas, as he calls him. And he’s asking me, ‘When is papa coming home?’ and I don’t know what to say. He’s not a criminal.”
The fear in immigrant communities can be measured by the empty restaurant booths and streets that are far quieter than usual.
People in LA are being asked to report sightings of ICE officials so others can be warned
I meet Soledad at the Mexican restaurant she owns in Hollywood. When I arrive, she’s watching the local news on the TV as yet another raid unfolds at a nearby farm.
She’s shaking her head as ICE agents face off with protesters and military helicopters hover overhead. “I am scared. I am very scared,” she says.
All of her eight employees are undocumented, and four of them are too scared to come into work, she says, in case they get arrested. The process to get papers, she says, is too long and too expensive.
Read more from Sky News:
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Soledad, who owns a Mexican restaurant, plans to hide her illegal workers if immigration officials arrive
“They call me and tell me they are too afraid to come in because immigration is around,” she says.
“I have to work double shifts to be able to make up for their hours, and yes, I am very desperate, and sometimes I cry… We have no sales, and no money to pay their wages.”
There is just one woman eating fajitas at a booth, where there would usually be a lunchtime rush. People are chilled by the raids.
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Soledad says she plans to hide her illegal workers if immigration officials arrive.
“I’ve told them, get inside the fridge, hide behind the stove, climb up where we have a space to store boxes, do not run because they will hunt you down.”
The White House says they’re protecting the country from criminals. ICE agents have been shot at while carrying out operations, their work becoming more dangerous by the day.
The tension here is ratcheting up. Deportation numbers are rising too. But the order from Donald Trump is to arrest even more people living here illegally.
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