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 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.
“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.”
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.
Students, charged and released with a date in court, are here now to collect their belongings. They’re missing bags, belts, shoes, all lost in the chaos of the night before.
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From the very heart of the protest encampment, our cameras had captured the chaos.
Officers moving in. Tear gas and rubber bullets to disperse. Stun grenades to disorientate.
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They were scenes which have stirred an already fevered debate about Israel and Gaza, yes, but about much more too. About America, about policing, and about free speech too.
President Biden said yesterday: “Vandalism, trespassing, breaking windows, shutting down campuses, forcing the cancellation of classes and graduations – none of this is a peaceful protest.”
‘Wrong’ say the protesters. Their movement, they say, is the very essence of protest; of civil disobedience which is threaded through US college campus history.
They reject any notion that they are threatening or violent. Yet the deeply divisive history of the Israel-Palestine conflict ensures that the beholder will so often be offended by the actions of the other side.
It was the students perceived antisemitism through their pro-Palestinian slogans which had drawn a group of pro-Israel protesters to the encampment earlier in the week.
The chaos of that night was reflected in a statement by the university’s student radio station which has been covering every twist.
“Counter protestors used bear mace, professional-grade fireworks and clubs to brutalize hundreds of our peers, UCLA turned a blind eye. Police were not called until hours into the onslaught and stood aside for over an hour as counter-protestors enacted racial, physical and chemical violence,” the statement from the UCLA Radio Managerial team said.
Watching the clear-up after the nighttime police sweep of the protesters I spotted two people embracing. A young man and an older woman.
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Professor recalls violent arrest at protest
It turned out to be a thread of history. One was a student who’d been arrested the night before.
The other was a student from a past time. Diane Salinger had been at New York’s Columbia University in 1968, at protests which now form a key chapter in American history.
“I’m so proud of these people here. I’m so proud,” she told me.
“You know the civil unrest of the students back in ’68 and it continued for several years, it actually changed the course of the Vietnam War and hopefully this is going to do the same thing.”
But then, back at the police station, a conversation that hints at the wider challenges for America.
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‘Tom’ is a protester who wanted to remain anonymous – a graduate who feels politically deserted in his own country. For him, no government is better than any on offer.
“The problem with our system is that we can’t rely on the police, we can’t rely on the military to keep us safe.
“When we need to make our voices heard, we need to make them heard, and the only way to do that without being repressed is by keeping each other safe and I think that last night and the last few months have really exemplified that,” he told me.
These protests are about more than Gaza. They are aligning a spectrum of dissent.
A scuba dive boat captain has been jailed for four years for criminal negligence over a fire that killed 34 people.
Captain Jerry Boylan was also sentenced to three years supervised release by a federal judge in Los Angeles, California.
The blaze on the vessel named Conception in September 2019 was the deadliest maritime disaster in recent American history.
Boylan was found guilty of one count of misconduct or neglect of ship officer last year.
The charge is a pre-Civil War statute, known colloquially as seaman’s manslaughter, and was designed to hold steamboat captains and crew responsible for maritime disasters.
In a sentencing memo, lawyers for Boylan – who is appealing – wrote: “While the loss of life here is staggering, there can be no dispute that Mr Boylan did not intend for anyone to die.
“Indeed, Mr Boylan lives with significant grief, remorse, and trauma as a result of the deaths of his passengers and crew.”
The Conception was anchored off Santa Cruz Island, 25 miles south of Santa Barbara, when it caught fire before dawn on the final day of a three-day voyage, sinking less than 30 metres from the shore.
Thirty-three passengers and a crew member died, trapped below deck.
Ms Wilson bought her most recent ticket at Family Food Mart in the US town of Mansfield and the shop will receive a $10,000 (£7,900) bonus for its sale of the ticket, according to the Massachusetts State Lottery.
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She bought her first $1m winning ticket at Dubs’s Discount Liquors in the same town.