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.
Image: A high-altitude balloon floats over Billings in Montana
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.
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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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0:19
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.”
Spy balloon threatens efforts to ease US-China relations
Distrust between the Chinese and the Americans is as high as it’s been for decades.
An incident like this would serve to feed that distrust no matter when it happened, but coming, as it has, just days before Secretary of State Antony Blinken’s highly significant visit to Beijing could seriously undermine tentative efforts being made on both sides to try to halt any further deterioration in relations.
Mr Blinken is expected to land in Beijing on Sunday and had planned to meet his opposite number Qin Gang as well as Wang Yi, China’s highest ranking diplomat.
A huge amount of painstaking diplomatic effort will have gone into making such a visit possible – the fact it was happening at all is a progress of sorts.
In recent days there has even been suggestions Mr Blinken might meet with President Xi Jinping himself.
If so, he would be the first US secretary of state granted this level of access in five years and it would be a major sign both sides are serious about attempting to smooth over their deeply damaged relations.
The Chinese leader and US President Joe Biden both recognised when they met at the G20 summit late last year that they need to do more to ensure that their distrust and competition does not descend into conflict and confrontation.
This visit was a clear part of that effort. But mutual recognition that spiralling tensions aren’t a good thing is not the same thing as the active rebuilding of trust.
This incident will likely be seen by the Americans as flying in the face of both. And there is, perhaps, an awareness here in Beijing of just how much jeopardy this incident poses to those fledgling efforts.
Indeed, at a regular news conference in Beijing on Friday, there was a clear desire on the Chinese part to contain speculation.
Foreign ministry spokesperson Mao Ning said China was “verifying” the situation and added: “I would like to emphasise that until the facts are clarified, speculation and hype will not be helpful to the proper resolution of the issue.”
Given the low ebb of current relations between the two, Mr Blinken’s visit was not expected to deliver any breakthroughs. It was being framed more as a chance for both sides to restate their positions and red lines and keep the channels of dialogue open.
It will likely never be known if this spy balloon was purposefully scheduled ahead of the visit or if it’s just unfortunate timing, but if it forces Mr Blinken to cancel, the ramifications for the longer term project of containing deteriorating relations could be very serious indeed.
The leaders went home buoyed in the knowledge that they’d finally convinced the American president not to abandon Europe, and he had committed to provide American “security guarantees” to Ukraine.
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0:49
European leaders sit down with Trump for talks
The details were sketchy, and sketched out only a little more through the week – we got some noise about American air cover – but regardless, the presidential commitment represented a clear shift from months of isolationist rhetoric on Ukraine – “it’s Europe’s problem” and all the rest of it.
Yet it was always the case that, beyond that clear achievement for the Europeans, Russiawould have a problem with it.
Trump’s envoy’s language last weekend – claiming that Putinhad agreed to Europe providing “Article 5-like” guarantees for Ukraine, essentially providing it with a NATO-like collective security blanket – was baffling.
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0:50
Trump: No US troops on ground in Ukraine
Russia gives two fingers to the president
And throughout this week, Russia’s foreign minister Sergei Lavrov has repeatedly and predictably undermined the whole thing, pointing out that Russia would never accept any peace plan that involved any European or NATO troops in Ukraine.
“The presence of foreign troops in Ukraine is completely unacceptable for Russia,” he said yesterday, echoing similar statements stretching back years.
Remember that NATO’s “eastern encroachment” was the justification for Russia’s “special military operation” – the invasion of Ukraine – in the first place. All this makes Trump look rather weak.
It’s two fingers to the president, though interestingly, the Russian language has been carefully calibrated not to poke Trump but to mock European leaders instead. That’s telling.
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4:02
Europe ‘undermining’ Ukraine talks
The bilateral meeting hailed by Trump on Monday as agreed and close – “within two weeks” – looks decidedly doubtful.
Maybe that’s why he went along with Putin’s suggestion that there be a bilateral, not including Trump, first.
It’s easier for the American president to blame someone else if it’s not his meeting, and it doesn’t happen.
NATO defence chiefs met on Wednesday to discuss the details of how the security guarantees – the ones Russia won’t accept – will work.
European sources at the meeting have told me it was all a great success. And to the comments by Lavrov, a source said: “It’s not up to Lavrov to decide on security guarantees. Not up to the one doing the threatening to decide how to deter that threat!”
The argument goes that it’s not realistic for Russia to say from which countries Ukraine can and cannot host troops.
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5:57
Sky’s Mark Stone takes you inside Zelenskyy-Trump 2.0
Would Trump threaten force?
The problem is that if Europe and the White House want Russia to sign up to some sort of peace deal, then it would require agreement from all sides on the security arrangements.
The other way to get Russia to heel would be with an overwhelming threat of force. Something from Trump, like: “Vladimir – look what I did to Iran…”. But, of course, Iranisn’t a nuclear power.
Something else bothers me about all this. The core concept of a “security guarantee” is an ironclad obligation to defend Ukraine into the future.
Future guarantees would require treaties, not just a loose promise. I don’t see Trump’s America truly signing up to anything that obliges them to do anything.
A layered security guarantee which builds over time is an option, but from a Kremlin perspective, would probably only end up being a repeat of history and allow them another “justification” to push back.
Among Trump’s stream of social media posts this week was an image of him waving his finger at Putin in Alaska. It was one of the few non-effusive images from the summit.
He posted it next to an image of former president Richard Nixon confronting Soviet leader Nikita Khrushchev – an image that came to reflect American dominance over the Soviet Union.
That may be the image Trump wants to portray. But the events of the past week suggest image and reality just don’t match.
The past 24 hours in Ukraine have been among the most violent to date.
Legislators in Texas have approved new congressional maps designed to boost Donald Trump’s Republicans at next year’s midterm elections.
Known as redistricting, the state’s re-drawn map would shift conservative voters into districts currently held by Democrats, and combine other districts with a Democratic majority into one.
The process is not new, and is completely legal – unless it is ruled to be racially motivated – but typically occurs every 10 years after the US Census to account for population changes.
The push to redistrict early came from Mr Trumphimself, who wants to bolster his chances of preserving the slim Republican majority in the House of Representatives at next year’s crucial midterms.
But by trying to re-draw the maps in the red state of Texas, Democrats have lined up their own counter redistricting effort in the blue state of California.
If more states decide to re-consider their maps, it has the potential to largely determine the outcome of the 2026 midterms, before a single vote is cast.
What’s happening in Texas?
Mr Trump first said he wanted politicians in Texas to redraw the state’s congressional district in July. The governor of Texas, Greg Abbott, followed up on the president’s demands, calling for a special session to vote on new maps.
“Please pass this map ASAP,” Mr Trump urged on his Truth Social platform on Monday. “Thank you, Texas!”
Image: Republican Texas State Representative Todd Hunter brought about the legislation. Pic: AP
In an effort to try to make passing the vote as difficult as possible, Democrats fled the state for two weeks. Per parliamentary rules, if enough Democrats refuse to take part in the special session, the Texas House can’t meet.
On their return, each Democratic politician was assigned a police escort to ensure they attended the session.
Nicole Collier, who refused the police escort, stayed in the House for two nights, and was pictured with an eye mask and blanket trying to sleep at her desk.
Image: Nicole Collier sleeps in the House chamber after refusing a police escort. Pic: Reuters
Once the debate started, the doors to the chamber were locked and all members wanting to leave had to get a permission slip to do so.
After nearly eight hours, the legislation to formally change the map was passed 88-52 on Wednesday.
It now needs to be approved by the Texas Senate, where Republicans hold a majority, and then signed off by Mr Abbott, who has already committed to doing just that.
Image: Activists protest against mid-decade redistricting in Texas. Pic: AP
Why re-draw maps?
Republicans in Texas have openly said the rally to re-draw congressional maps is in the party’s interest.
Todd Hunter, the Republican who wrote the legislation formally creating the new map, told the House: “The underlying goal of this plan is straight forward: improve Republican political performance.”
He said the dispute is nothing more than a partisan fight, and made reference to the US Supreme Court having previously allowed politicians to redraw districts for partisan purposes.
Democrats hit back, arguing the disagreement was about more than partisanship.
“In a democracy, people choose their representatives,” representative Chris Turner said. “This bill flips that on its head and lets politicians in Washington, DC, choose their voters.”
Another Democrat, John H Bucy, blamed the president, saying: “This is Donald Trump’s map.
“It clearly and deliberately manufactures five more Republican seats in Congress because Trump himself knows that the voters are rejecting his agenda.”
How have Democrats responded?
The move by Republicans has triggered a tit-for-tat move by the Democrats, who are due to meet in California on Thursday to revise the state’s maps in order to gain five more seats.
To enact the same powers in California will prove harder, as state laws require an independent commission to take responsibility for redistricting – meaning it would need to be approved by voters in a special election.
In other blue states, rules are even tighter. For example, in New York, they cannot draw new maps until 2028, and even then, only with voter approval.
Despite the obstacles, California governor Gavin Newsom confirmed a redistricting election will take place in the state on 4 November, in order to “fight fire with fire”.
His plan has gained support from former president Barack Obama, who said it was necessary to “stave off” the Republicans’ move in Texas.
Image: Barack Obama attends Trump’s inauguration in January. Pic: The New York Times via AP
Could this affect the midterms?
The midterms in November next year will likely be on a knife edge.
Whatever the outcome, it could shape the remainder of Mr Trump’s second term in office. A Democrat majority would make it tougher for him to pass laws.
Currently, Republicans control the House of Representatives in Washington, 219-212 (excluding four open vacancies). A party needs 218 seats for a majority.
In the Senate, the Republicans hold a similarly slim majority of 53 to 45.
Image: Gavin Newsom is framing his response as the ‘election rigging response act’. Pic: Reuters
However, the incumbent president’s party typically loses seats in the midterms.
In the 2018 midterms, during Mr Trump’s first tenure as president, the Democrats took control of the House. Likewise, in 2022, when Joe Biden was president, the House swung back to the Republicans.
It’s important to note that 27 House seats will remain in states that are unlikely to redraw their maps, according to The New York Times.
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In a bid to avoid a repeat of history, Mr Trump is pushing for redistricting in states beyond Texas. Top Republicans in states like Indiana, Missouri, and Florida continue to talk about tweaking their maps to create more Republican-controlled congressional seats.
While Ohio has to legally redraw, the timing of which could benefit the Republicans, and, by extension, Mr Trump.
Donald Trump has said American troops will not be sent to Ukraine, but the US may provide air support as part of a peace deal with Russia.
A day after his extraordinary White House meeting with Ukrainian President Volodymyr Zelenskyy and the leaders of Kyiv’s European allies, the US president told Fox News “when it comes to security, [Europeans] are willing to put people on the ground. We’re willing to help them with things, especially, probably, by air”.
Mr Trump did not elaborate, but White House press secretary Karoline Leavitt told reporters US air support was “an option and a possibility”.
She said the US president “has definitively stated US boots will not be on the ground in Ukraine, but we can certainly help in the coordination and perhaps provide other means of security guarantees to our European allies”.
Air support could take many forms, including missile defence systems or fighter jets enforcing a no-fly zone – and it’s not clear what role the US would play under any proposed peace deal.
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4:14
What security guarantees could work?
Zelenskyy-Putin summit
It comes as planning for a possible Zelenskyy-Putin summit get under way. Talks between the Ukrainian and Russian president are seen by Mr Trump as vital to ending the war.
Sky News understands a meeting could happen before the end of the month, with Geneva, Vienna, Rome, Budapest, and Doha among the venues being considered.
Geneva, Switzerland, is considered the best option, with Rome or the Vatican disliked by the Russians and Budapest, Hungary, not favoured by the Ukrainians.
European allies are understood to want security guarantees to be defined before the meeting.
A NATO-like treaty, guaranteeing Ukraine’s allies would come to its defence in case of any future Russian attack, is being worked on and could be completed by next week.
Like the US, Sky News understands Italy is opposed to putting boots on the ground in Ukraine.
But EU diplomats are confident this is the best chance yet to stop the war, and allies could return to Washington in early September to celebrate any deal being struck.
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5:57
Sky’s Mark Stone takes you inside Zelenskyy-Trump 2.0
Trump still has doubts about Putin
Despite the renewed optimism about a peace deal following Monday’s White House summit, Mr Trump has admitted Vladimir Putin might not be sincere about wanting to end the war.
“We’re going to find out about President Putin in the next couple of weeks,” he told Fox News.
He’s previously threatened to put more sanctions on Russia if a peace deal isn’t reached, though previously set deadlines have been and gone.
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Russia launched its biggest air assault on Ukraine in more than a month on Monday night, sending 270 drones and 10 missiles, the Ukrainian air force said.
Ukraine’s European allies in the so-called Coalition of the Willing, an initiative spearheaded by Sir Keir Starmer and Emmanuel Macron, discussed additional sanctions to place on Russia on Tuesday.