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, described as being the size of three buses, 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.
US Secretary of State Antony Blinken is postponing a high-profile visit to China which had been due to begin on Sunday.
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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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.”
Donald Trump has revealed hefty trade tariffs against at least seven countries, to be applied from 1 August.
The initial announcement, via his Truth Social platform, concerned Japan and South Korea.
Both would face 25% rates on all goods, he said.
Malaysia and Kazakhstan were later added to the list, while South Africa was told it faced a 30% rate.
Laos and Myanmar were hit with 40% duties.
It marks the restart of the threatened “liberation day” escalation that was paused in April, for 90 days, to allow for negotiations to take place with all US trading partners.
The US president is sending each nation a letter to inform them of the tariff rates they face and warn against retaliatory tariffs.
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Those duties will come on top of sector-specific tariffs – such as 50% rates covering steel – which are already in force.
Mr Trump says in the letters that rates can be adjusted “upward or downward, depending on our relationship with your country”.
Country-specific tariffs had been due to take effect from Wednesday this week but Mr Trump had earlier revealed that nations would start to get letters instead, setting out the US position.
The letters sent to Japan and South Korea cited persistent trade imbalances for the rates and included the sentence: “We invite you to participate in the extraordinary Economy of the United States, the Number One Market in the World, by far.”
He ended both letters by saying, “Thank you for your attention to this matter!”
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The European Union – the biggest single US trading partner – is among those set to get a letter in the coming days.
Mr Trump has also threatened an additional 10% tariff on any country aligning itself with the “anti-American policies” of BRICS nations – those are Brazil, Russia, India, China and South Africa and whose members also include Egypt, Ethiopia, Indonesia, Iran and the United Arab Emirates.
The UK, bar a massive shock U-turn, should be exempt.
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2:49
What does the UK-US trade deal involve?
The country was the first to be granted a trade deal, of sorts, in May and the Trump administration has claimed many others had been offering concessions since the clock ticked down to 9 July.
The UK is not expected to face any changes to its current 10% rate due to the trade truce, which came into effect last week.
While UK-made cars aerospace products face no duties under a new quota arrangement, it still remains to be seen whether 25% tariffs on UK-produced steel and aluminium will be cancelled.
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5:08
Can the UK avoid steel tariffs?
They could, conceivably, even be raised to 50%, as is currently the case for America’s other trading partners, because no agreement on eliminating the rate was reached when the government struck its deal in May.
It all amounts to more uncertainty for the UK steel sector.
A No 10 spokesman said on Monday: “Our work with the US continues to get this deal implemented as soon as possible.
“That will remove the 25% tariff on UK steel and aluminium, making us the only country in the world to have tariffs removed on these products.
“The US agreed to remove tariffs on these products as part of our agreement on 8 May. It reiterated that again at the G7 last month. The discussions continue, and will continue to do so.”
China and Vietnam have also secured some US concessions.
The dollar strengthened but US stock markets lost ground in the wake of the letters to Japan and South Korea being made public, with the broad-based S&P 500 down by 1%.
Stock markets in both Japan and South Korea were closed for the day but US-traded shares of SK Telecom and LG Display were down 7.5% and 5.8% respectively.
Details of those who have died and those who are missing after US flash floods are slowly emerging – with several young girls among those unaccounted for.
At least 82 people have died from the flooding in Texas, with an unknown number of people – including 10 girls and a counsellor from Camp Mystic in Kerr County – still missing.
As much as 10ins (25cm) of heavy rain fell in just a few hours overnight in central Kerr County on Friday, causing the banks of the Guadalupe River to burst at around 4am local time.
Tributes to those who died, and appeals for those who are still missing, are now being shared.
Image: Officials said 27 girls from Camp Mystic were reported missing after the flash floods in Texas
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3:35
Texas searches for missing children
Who are the victims?
Renee Smajstrla, eight
Image: Renee Smajstrla. Pic: Family handout
Renee’s uncle Shawn Salta confirmed the eight-year-old had died, and said she was one of 700 children staying at Camp Mystic.
“Renee has been found and while not the outcome we prayed for, the social media outreach likely assisted the first responders in helping to identify her so quickly,” he said.
“We are thankful she was with her friends and having the time of her life, as evidenced by this picture from yesterday.
“She will forever be living her best life at Camp Mystic.”
Sarah Marsh, eight
Image: Sarah Marsh. Pic: Family handout
Mountain Brook mayor Stewart Welch confirmed the death of eight-year-old Sarah, from Alabama, who was a pupil at Cherokee Bend Elementary.
“This is an unimaginable loss for her family, her school, and our entire community,” he said. “Sarah’s passing is a sorrow shared by all of us, and our hearts are with those who knew and loved her.
“As we grieve alongside the Marsh family, we also remember the many others affected by this tragedy.”
Eloise Peck and Lila Bonner, both nine
Image: Lila Bonner (left) and Eloise Peck. Pic: Family handout
Eloise’s mother Missy Peck told local broadcaster FOX4 that her daughter and Lila were best friends and cabinmates at Camp Mystic.
Writing about her daughter on Instagram, Ms Peck said: “She lost her life in the tragic flooding… our family is grieving and processing this unimaginable loss together.”
Lila’s family told NBC Dallas Fort Worth, a local affiliate network of Sky’s US partner network, that they were in “unimaginable grief”, and said: “We ache with all who loved her.”
Janie Hunt, nine
Image: Janie Hunt
Janie’s family confirmed her death to a reporter from NBC Dallas Fort Worth, who said “her mother tells me she’s devastated”.
Richard ‘Dick’ Eastland, owner of Camp Mystic
Image: Richard ‘Dick’ Eastland, owner of Camp Mystic. Pic: Family handout
Kerr County judge Rob Kelly told the Washington Post that Mr Eastland, who owned the camp died in a helicopter on the way to a Houston hospital.
Local outlet The Kerrville Daily Times reported he was killed while trying to save the girls from the flash floods.
“It doesn’t surprise me at all that his last act of kindness and sacrifice was working to save the lives of campers,” guest columnist Paige Sumner said in the Daily Times’ tribute to Mr Eastland.
Blair and Brooke Harber, 13 and 11
Image: Blair and Brooke Harber. Pic: Family handout
RJ Harber told CNN his daughters died during flooding in Kerr County, saying Blair “was a gifted student and had a generous kind heart”.
He added that Brooke “was like a light in any room, people gravitated to her and she made them laugh and enjoy the moment”.
He also said both his parents were still missing.
Jane Ragsdale, owner of Heart O’ the Hills camp
Image: Jane Ragsdale. Pic: Heart O’ the Hills
On Heart O’ the Hills’s website, the camp confirmed it was “right in the path of the flood” along the Guadalupe River.
While there were no campers in residence, Jane Ragsdale died. The camp said: “We at the camp are stunned and deeply saddened by Jane’s death.
“She embodied the spirit of Heart O’ the Hills and was exactly the type of strong, joyful woman that the camp aimed to develop with the girls entrusted to us each summer.”
Julian Ryan, 27
Image: Julian Ryan. Pic: GoFundMe
Relatives of Mr Ryan told local news broadcaster KHOU 11 that he died saving his family from floodwaters in Texas Hill County.
They described how he tried to smash a window to help them escape the rising water, but it cut his arm and he bled out before help could arrive.
Tanya Burwick, 62
Image: Tanya Burwick. Pic: Rhea Brunswick via AP
Ms Burwick was heading to work at a Walmart in the San Angelo area early Friday when the flood waters hit.
When she didn’t show up for work, her employer filed a missing persons report and sent another colleague to look for the 62-year-old.
Police found Ms Burwick’s unoccupied SUV fully submerged later that day, before locating her body on Saturday morning, “several blocks” away from her car.
Her daughter, Lindsey Burwick, said her mother was a beloved parent, grandparent and colleague to many, adding: “She lit up the room and had a laugh that made other people laugh.”
The area around the Guadalupe River is home to dozens of summer camps, but it is Camp Mystic that was long favoured by the Texas elite.
For almost a century, the daughters of senators, presidents, and oil barons would stream through the gates each summer.
“The camp has always served as a near-flawless training ground for archetypal Texas women,” wrote Texas Monthly writer Mimi Swartz in a 2011 profile.
First Lady Laura Bush was a camp counsellor there during college, while President Lyndon B Johnson sent daughters and granddaughters through the green gates.
Nicole Nugent Covert, granddaughter of Lady Bird and Lyndon B Johnson, described dropping her daughter off at Mystic.
“You get a feeling when you drive up to the Hill Country and you’d see the Mystic sign, and you’d feel the weight of the world had been lifted off you,” she told the Austin American-Statesman in 2010.
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“There were no worries. I still feel that way. When I drop my daughter off, I’m jealous.”
Once inside the Christian camp, hundreds of girls would learn to ride horses, catch fish, and hunt. They wore white on Sundays, when fried chicken was also served.
The halcyon summer days would culminate in a war-canoe race between two competing “tribes”.
Image: Items lie scattered inside a cabin at Camp Mystic. Pic: Reuters
A deposit for the camp cost $400 – while the current full fee is unknown in 2011 it cost $4,300 (£3,150) for a 30-day session.
Camp director dies ‘saving girls’
Founded in 1926, the camp was bought by Agnes Doran Stacy, a Dallas socialite, and her husband, Pop, in 1939, and has stayed in the family for the next three generations.
Mystic’s family bond came under pressure in 2011 when the Eastland siblings – grandchildren of Agnes – got into a messy legal battle over the 725-acre camp. The family eventually reached a confidential settlement in 2012.
Image: A Camp Mystic sign is seen near the entrance. Pic: AP
Current director Dick Eastland, who ran the camp alongside his wife Tweety, has been confirmed dead by his grandson. George Eastland said his grandfather died trying to save the girls in his care when the flash floods suddenly hit.
At first, 27 of the camp’s girls were missing, their cabins swept away in waters that rose suddenly at 4am. That figure is now 11 – 10 campers and one counsellor.
Image: Renee Smajstrla, 8, died in the flash floods at Camp Mystic, Texas. Pic: Family handout
“She will forever be living her best life at Camp Mystic,” Renee’s uncle, Shawn Salta, wrote in tribute to her.
The ‘Mystic mafia’ mourns
In her 2011 article, Swartz described a “Mystic mafia” of women that stretched across the world, their bonds forged by summers at camp.
And those legions of women are mourning today.
“Camp Mystic has been my safe haven for years – a place of peace, joy, and true belonging,” one wrote on social media.
“It’s where light lives and God’s love overflows. A true slice of Heaven on earth. This weekend, tragedy has struck this sacred space, and my heart is shattered.”
“Mystic gave me more than I really know how to put into words. my heart breaks for the campers, staff, and their families in this impossible time,” another wrote.